Re: [Dell Inspiron 15R 5521] Can't toggle backlight brightness

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Le lun. 14 oct. 2013 11:33:29 CEST, Jani Nikula a écrit :
> On Mon, 14 Oct 2013, Nicolas Devillers <devillers.nicolas@xxxxxxxxx> wrote:
>> Unfortunately this seems to cause others unpexected issue like ACPI
>> unstability and crash on suspend/resume.
>> I reported the issue in the following bug
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214287
>
> I can imagine the BIOS tripping over itself if you do
> acpi_osi=Linux. Can you reproduce the problems with merely
> acpi_backlight=vendor?
>
> In any case, i915 does exactly the same things with or without
> acpi_backlight=vendor, and the changes are in the ACPI driver. These are
> not i915 bugs.
>
> BR,
> Jani.
>
>
>
>
>>
>>
>> 2013/10/14 Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
>>
>>> On Thu, 10 Oct 2013, Nicolas Devillers <devillers.nicolas@xxxxxxxxx>
>>> wrote:
>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>> Hash: SHA1
>>>>
>>>> This mail is a follow-up of
>>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1225811
>>>>
>>>> - - Summary of the problem:
>>>>
>>>> [Dell Inspiron 15R 5521] (using i915 drv) Can't toggle backlight
>>> brightness
>>>>
>>>> - - Full description of the problem/report:
>>>>
>>>> Since Ubuntu Raring at least, it is not possible to setup backlight
>>>> brightness without adding acpi_backlight=vendor into grub boot option.
>>>
>>> That makes the ACPI driver not register its own backlight interface, and
>>> forces use of the i915's intel_backlight interface. Which apparently
>>> works.
>>>
>>> You may find [1] relevant.
>>>
>>> BR,
>>> Jani.
>>>
>>>
>>> [1]
>>> http://mid.gmane.org/1381498066-16011-1-git-send-email-aaron.lu@xxxxxxxxx
>>>
>>>
>>>
>>>>
>>>> - - Kernel version:
>>>>
>>>> Linux version 3.12.0-031200rc3-generic
>>>>
>>>> - - Environment
>>>>
>>>> Description:    Ubuntu Saucy Salamander (development branch)
>>>> Release:    13.10
>>>>
>>>> - -  Module information (from /proc/modules):
>>>>
>>>> ebtable_broute 12731 0 - Live 0x0000000000000000 (F)
>>>> bridge 110502 1 ebtable_broute, Live 0x0000000000000000 (F)
>>>> stp 12976 1 bridge, Live 0x0000000000000000 (F)
>>>> llc 14552 2 bridge,stp, Live 0x0000000000000000 (F)
>>>> ebtable_nat 12807 0 - Live 0x0000000000000000 (F)
>>>> ebtable_filter 12827 0 - Live 0x0000000000000000 (F)
>>>> ebtables 30884 3 ebtable_broute,ebtable_nat,ebtable_filter, Live
>>>> 0x0000000000000000 (F)
>>>> r8169 67341 0 - Live 0x0000000000000000
>>>> mii 13934 1 r8169, Live 0x0000000000000000 (F)
>>>> pci_stub 12622 1 - Live 0x0000000000000000
>>>> vboxpci 23194 0 - Live 0x0000000000000000 (OF)
>>>> vboxnetadp 25670 0 - Live 0x0000000000000000 (OF)
>>>> vboxnetflt 27613 0 - Live 0x0000000000000000 (OF)
>>>> vboxdrv 320455 3 vboxpci,vboxnetadp,vboxnetflt, Live 0x0000000000000000
>>> (OF)
>>>> nfnetlink_queue 18117 0 - Live 0x0000000000000000 (F)
>>>> nfnetlink_log 17908 0 - Live 0x0000000000000000 (F)
>>>> nfnetlink 14606 2 nfnetlink_queue,nfnetlink_log, Live 0x0000000000000000
>>> (F)
>>>> xt_tcpudp 12884 0 - Live 0x0000000000000000 (F)
>>>> nf_conntrack_ipv4 15012 0 - Live 0x0000000000000000 (F)
>>>> nf_defrag_ipv4 12729 1 nf_conntrack_ipv4, Live 0x0000000000000000 (F)
>>>> xt_conntrack 12760 0 - Live 0x0000000000000000 (F)
>>>> nf_conntrack 91736 2 nf_conntrack_ipv4,xt_conntrack, Live
>>>> 0x0000000000000000 (F)
>>>> ip_tables 27239 0 - Live 0x0000000000000000 (F)
>>>> x_tables 34059 4 ebtables,xt_tcpudp,xt_conntrack,ip_tables, Live
>>>> 0x0000000000000000 (F)
>>>> parport_pc 32701 0 - Live 0x0000000000000000 (F)
>>>> ppdev 17671 0 - Live 0x0000000000000000 (F)
>>>> bnep 19564 2 - Live 0x0000000000000000
>>>> rfcomm 69070 12 - Live 0x0000000000000000
>>>> binfmt_misc 17468 1 - Live 0x0000000000000000 (F)
>>>> nfsd 279192 2 - Live 0x0000000000000000 (F)
>>>> auth_rpcgss 54489 1 nfsd, Live 0x0000000000000000 (F)
>>>> nfs_acl 12837 1 nfsd, Live 0x0000000000000000 (F)
>>>> nfs 180519 0 - Live 0x0000000000000000 (F)
>>>> lockd 93583 2 nfsd,nfs, Live 0x0000000000000000 (F)
>>>> sunrpc 271025 6 nfsd,auth_rpcgss,nfs_acl,nfs,lockd, Live
>>>> 0x0000000000000000 (F)
>>>> fscache 58475 1 nfs, Live 0x0000000000000000 (F)
>>>> dm_crypt 22728 1 - Live 0x0000000000000000 (F)
>>>> nls_iso8859_1 12713 1 - Live 0x0000000000000000 (F)
>>>> x86_pkg_temp_thermal 14162 0 - Live 0x0000000000000000
>>>> intel_powerclamp 14705 0 - Live 0x0000000000000000
>>>> kvm_intel 138538 0 - Live 0x0000000000000000 (F)
>>>> kvm 431315 1 kvm_intel, Live 0x0000000000000000 (F)
>>>> crct10dif_pclmul 14289 0 - Live 0x0000000000000000 (F)
>>>> crc32_pclmul 13113 0 - Live 0x0000000000000000 (F)
>>>> ghash_clmulni_intel 13259 0 - Live 0x0000000000000000 (F)
>>>> aesni_intel 55624 5816 - Live 0x0000000000000000 (F)
>>>> aes_x86_64 17131 1 aesni_intel, Live 0x0000000000000000 (F)
>>>> lrw 13257 1 aesni_intel, Live 0x0000000000000000 (F)
>>>> gf128mul 14951 1 lrw, Live 0x0000000000000000 (F)
>>>> glue_helper 13990 1 aesni_intel, Live 0x0000000000000000 (F)
>>>> ablk_helper 13597 1 aesni_intel, Live 0x0000000000000000 (F)
>>>> cryptd 20329 2909 ghash_clmulni_intel,aesni_intel,ablk_helper, Live
>>>> 0x0000000000000000 (F)
>>>> dell_wmi 12761 0 - Live 0x0000000000000000
>>>> sparse_keymap 13948 1 dell_wmi, Live 0x0000000000000000
>>>> dell_laptop 17369 0 - Live 0x0000000000000000
>>>> dcdbas 14847 1 dell_laptop, Live 0x0000000000000000
>>>> rts5139 331166 0 - Live 0x0000000000000000 (C)
>>>> uvcvideo 80885 0 - Live 0x0000000000000000
>>>> videobuf2_vmalloc 13216 1 uvcvideo, Live 0x0000000000000000
>>>> videobuf2_memops 13362 1 videobuf2_vmalloc, Live 0x0000000000000000
>>>> videobuf2_core 40469 1 uvcvideo, Live 0x0000000000000000
>>>> videodev 133390 2 uvcvideo,videobuf2_core, Live 0x0000000000000000
>>>> joydev 17377 0 - Live 0x0000000000000000 (F)
>>>> arc4 12608 2 - Live 0x0000000000000000 (F)
>>>> iwldvm 237440 0 - Live 0x0000000000000000
>>>> mac80211 596969 1 iwldvm, Live 0x0000000000000000
>>>> btusb 28267 0 - Live 0x0000000000000000
>>>> snd_hda_codec_hdmi 41276 1 - Live 0x0000000000000000
>>>> snd_hda_codec_realtek 51465 1 - Live 0x0000000000000000
>>>> snd_hda_intel 48171 5 - Live 0x0000000000000000
>>>> bluetooth 371874 22 bnep,rfcomm,btusb, Live 0x0000000000000000
>>>> snd_hda_codec 188738 3
>>>> snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel, Live
>>>> 0x0000000000000000
>>>> snd_hwdep 13602 1 snd_hda_codec, Live 0x0000000000000000 (F)
>>>> snd_pcm 102033 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec, Live
>>>> 0x0000000000000000 (F)
>>>> snd_page_alloc 18710 2 snd_hda_intel,snd_pcm, Live 0x0000000000000000 (F)
>>>> snd_seq_midi 13324 0 - Live 0x0000000000000000 (F)
>>>> snd_seq_midi_event 14899 1 snd_seq_midi, Live 0x0000000000000000 (F)
>>>> snd_rawmidi 30095 1 snd_seq_midi, Live 0x0000000000000000 (F)
>>>> snd_seq 61560 2 snd_seq_midi,snd_seq_midi_event, Live 0x0000000000000000
>>> (F)
>>>> snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq, Live
>>>> 0x0000000000000000 (F)
>>>> snd_timer 29433 2 snd_pcm,snd_seq, Live 0x0000000000000000 (F)
>>>> snd 69141 20
>>>>
>>> snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq_midi,snd_rawmidi,snd_seq,snd_seq_device,snd_timer,
>>>> Live 0x0000000000000000 (F)
>>>> microcode 23518 0 - Live 0x0000000000000000 (F)
>>>> iwlwifi 165398 1 iwldvm, Live 0x0000000000000000
>>>> psmouse 97626 0 - Live 0x0000000000000000 (F)
>>>> serio_raw 13413 0 - Live 0x0000000000000000 (F)
>>>> cfg80211 479757 3 iwldvm,mac80211,iwlwifi, Live 0x0000000000000000
>>>> lpc_ich 21080 0 - Live 0x0000000000000000
>>>> mei_me 18421 0 - Live 0x0000000000000000
>>>> mei 77692 1 mei_me, Live 0x0000000000000000
>>>> soundcore 12680 1 snd, Live 0x0000000000000000 (F)
>>>> mac_hid 13205 0 - Live 0x0000000000000000
>>>> coretemp 13435 0 - Live 0x0000000000000000
>>>> i8k 14421 0 - Live 0x0000000000000000
>>>> lp 17759 0 - Live 0x0000000000000000 (F)
>>>> parport 42299 3 parport_pc,ppdev,lp, Live 0x0000000000000000 (F)
>>>> hid_generic 12548 0 - Live 0x0000000000000000
>>>> usbhid 53014 0 - Live 0x0000000000000000
>>>> hid 101512 2 hid_generic,usbhid, Live 0x0000000000000000
>>>> radeon 1402449 2 - Live 0x0000000000000000
>>>> i915 655752 3 - Live 0x0000000000000000
>>>> ttm 83995 1 radeon, Live 0x0000000000000000
>>>> ahci 25819 3 - Live 0x0000000000000000 (F)
>>>> libahci 31898 1 ahci, Live 0x0000000000000000 (F)
>>>> i2c_algo_bit 13413 2 radeon,i915, Live 0x0000000000000000
>>>> drm_kms_helper 52651 2 radeon,i915, Live 0x0000000000000000
>>>> drm 296739 8 radeon,i915,ttm,drm_kms_helper, Live 0x0000000000000000
>>>> wmi 19070 1 dell_wmi, Live 0x0000000000000000
>>>> video 19318 1 i915, Live 0x0000000000000000 (F)
>>>>
>>>>
>>>> - - Loaded driver and hardware information (/proc/ioports, /proc/iomem)
>>>>
>>>> ioports:
>>>>
>>>> 0000-0cf7 : PCI Bus 0000:00
>>>>   0000-001f : dma1
>>>>   0020-0021 : pic1
>>>>   0040-0043 : timer0
>>>>   0050-0053 : timer1
>>>>   0060-0060 : keyboard
>>>>   0062-0062 : EC data
>>>>   0064-0064 : keyboard
>>>>   0066-0066 : EC cmd
>>>>   0070-0077 : rtc0
>>>>   0080-008f : dma page reg
>>>>   00a0-00a1 : pic2
>>>>   00c0-00df : dma2
>>>>   00f0-00ff : fpu
>>>>   0400-0403 : ACPI PM1a_EVT_BLK
>>>>   0404-0405 : ACPI PM1a_CNT_BLK
>>>>   0408-040b : ACPI PM_TMR
>>>>   0410-0415 : ACPI CPU throttle
>>>>   0420-042f : ACPI GPE0_BLK
>>>>   0430-0433 : iTCO_wdt
>>>>   0450-0450 : ACPI PM2_CNT_BLK
>>>>   0454-0457 : pnp 00:06
>>>>   0458-047f : pnp 00:04
>>>>     0460-047f : iTCO_wdt
>>>>   0500-057f : pnp 00:04
>>>>   0680-069f : pnp 00:04
>>>> 0cf8-0cff : PCI conf1
>>>> 0d00-ffff : PCI Bus 0000:00
>>>>   1000-100f : pnp 00:04
>>>>   164e-164f : pnp 00:04
>>>>   2000-2fff : PCI Bus 0000:07
>>>>     2000-20ff : 0000:07:00.0
>>>>       2000-20ff : r8169
>>>>   3000-3fff : PCI Bus 0000:01
>>>>     3000-30ff : 0000:01:00.0
>>>>   4000-403f : 0000:00:02.0
>>>>   4040-405f : 0000:00:1f.3
>>>>   4060-407f : 0000:00:1f.2
>>>>     4060-407f : ahci
>>>>   4080-4087 : 0000:00:1f.2
>>>>     4080-4087 : ahci
>>>>   4088-408f : 0000:00:1f.2
>>>>     4088-408f : ahci
>>>>   4090-4093 : 0000:00:1f.2
>>>>     4090-4093 : ahci
>>>>   4094-4097 : 0000:00:1f.2
>>>>     4094-4097 : ahci
>>>>   fd60-fd63 : pnp 00:04
>>>>   ffff-ffff : pnp 00:04
>>>>     ffff-ffff : pnp 00:04
>>>>
>>>> iomem
>>>> 00000000-00000fff : reserved
>>>> 00001000-00087fff : System RAM
>>>> 00088000-000bffff : reserved
>>>>   000a0000-000bffff : PCI Bus 0000:00
>>>> 000c0000-000c3fff : PCI Bus 0000:00
>>>> 000c4000-000c7fff : PCI Bus 0000:00
>>>> 000c8000-000cbfff : PCI Bus 0000:00
>>>> 000cc000-000cffff : PCI Bus 0000:00
>>>> 000d0000-000d3fff : PCI Bus 0000:00
>>>> 000d4000-000d7fff : PCI Bus 0000:00
>>>> 000d8000-000dbfff : PCI Bus 0000:00
>>>> 000dc000-000dffff : PCI Bus 0000:00
>>>> 000e0000-000e3fff : PCI Bus 0000:00
>>>> 000e4000-000e7fff : PCI Bus 0000:00
>>>> 000e8000-000ebfff : PCI Bus 0000:00
>>>> 000ec000-000effff : PCI Bus 0000:00
>>>> 000f0000-000fffff : PCI Bus 0000:00
>>>>   000f0000-000fffff : System ROM
>>>> 00100000-1fffffff : System RAM
>>>>   02000000-02707105 : Kernel code
>>>>   02707106-02d10dff : Kernel data
>>>>   02e70000-02fe3fff : Kernel bss
>>>> 20000000-201fffff : reserved
>>>>   20000000-201fffff : pnp 00:0a
>>>> 20200000-40003fff : System RAM
>>>>   2c000000-33ffffff : Crash kernel
>>>> 40004000-40004fff : reserved
>>>>   40004000-40004fff : pnp 00:0a
>>>> 40005000-8ffaffff : System RAM
>>>> 8ffb0000-913affff : reserved
>>>> 913b0000-99dbefff : System RAM
>>>> 99dbf000-9aebefff : reserved
>>>> 9aebf000-9afbefff : ACPI Non-volatile Storage
>>>> 9afbf000-9affefff : ACPI Tables
>>>> 9afff000-9affffff : System RAM
>>>> 9b000000-9f9fffff : reserved
>>>> 9fa00000-feafffff : PCI Bus 0000:00
>>>>   9fa00000-9fa00fff : pnp 00:09
>>>>   a0000000-afffffff : PCI Bus 0000:01
>>>>     a0000000-afffffff : 0000:01:00.0
>>>>   b0000000-bfffffff : 0000:00:02.0
>>>>   c0000000-c0ffffff : PCI Bus 0000:01
>>>>     c0000000-c003ffff : 0000:01:00.0
>>>>     c0040000-c005ffff : 0000:01:00.0
>>>>   c1000000-c13fffff : 0000:00:02.0
>>>>   c1400000-c14fffff : PCI Bus 0000:07
>>>>     c1400000-c1403fff : 0000:07:00.0
>>>>       c1400000-c1403fff : r8169
>>>>     c1404000-c1404fff : 0000:07:00.0
>>>>       c1404000-c1404fff : r8169
>>>>   c1500000-c15fffff : PCI Bus 0000:08
>>>>     c1500000-c1501fff : 0000:08:00.0
>>>>       c1500000-c1501fff : iwlwifi
>>>>   c1600000-c160ffff : 0000:00:14.0
>>>>     c1600000-c160ffff : xhci_hcd
>>>>   c1610000-c1613fff : 0000:00:1b.0
>>>>     c1610000-c1613fff : ICH HD audio
>>>>   c1614000-c161400f : 0000:00:16.0
>>>>     c1614000-c161400f : mei_me
>>>>   c1615000-c16150ff : 0000:00:1f.3
>>>>   c1617000-c16177ff : 0000:00:1f.2
>>>>     c1617000-c16177ff : ahci
>>>>   c1618000-c16183ff : 0000:00:1d.0
>>>>     c1618000-c16183ff : ehci_hcd
>>>>   c1619000-c16193ff : 0000:00:1a.0
>>>>     c1619000-c16193ff : ehci_hcd
>>>>   e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
>>>>     e0000000-efffffff : reserved
>>>>       e0000000-efffffff : pnp 00:09
>>>> feb00000-feb03fff : reserved
>>>> fec00000-fec00fff : reserved
>>>>   fec00000-fec003ff : IOAPIC 0
>>>> fed00000-fed003ff : HPET 0
>>>> fed10000-fed19fff : reserved
>>>>   fed10000-fed17fff : pnp 00:09
>>>>   fed18000-fed18fff : pnp 00:09
>>>>   fed19000-fed19fff : pnp 00:09
>>>> fed1c000-fed1ffff : reserved
>>>>   fed1c000-fed1ffff : pnp 00:09
>>>>     fed1f410-fed1f414 : iTCO_wdt
>>>> fed20000-fed3ffff : pnp 00:09
>>>> fed90000-fed90fff : dmar0
>>>> fed91000-fed91fff : dmar1
>>>> fee00000-fee00fff : Local APIC
>>>>   fee00000-fee00fff : reserved
>>>> ff000000-ff000fff : pnp 00:09
>>>> ffb80000-ffffffff : reserved
>>>> 100000000-25f5fffff : System RAM
>>>> 25f600000-25fffffff : RAM buffer
>>>>
>>>>
>>>> - - PCI information ('lspci -vvv' as root)
>>>>
>>>> 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM
>>>> Controller (rev 09)
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx-
>>>>     Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort+ >SERR- <PERR- INTx-
>>>>     Latency: 0
>>>>     Capabilities: [e0] Vendor Specific Information: Len=0c <?>
>>>>
>>>> 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
>>>> processor PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx+
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0, Cache Line Size: 64 bytes
>>>>     Bus: primary=00, secondary=01, subordinate=06, sec-latency=0
>>>>     I/O behind bridge: 00003000-00003fff
>>>>     Memory behind bridge: c0000000-c0ffffff
>>>>     Prefetchable memory behind bridge: 00000000a0000000-00000000afffffff
>>>>     Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort+ <SERR- <PERR-
>>>>     BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
>>>>         PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>>>     Capabilities: [88] Subsystem: Dell Device 05b8
>>>>     Capabilities: [80] Power Management version 3
>>>>         Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>>>> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>>>         Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>>>>     Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>>>>         Address: fee002f8  Data: 0000
>>>>     Capabilities: [a0] Express (v2) Root Port (Slot+), MSI 00
>>>>         DevCap:    MaxPayload 256 bytes, PhantFunc 0, Latency L0s <64ns,
>>>> L1 <1us
>>>>             ExtTag- RBE+ FLReset-
>>>>         DevCtl:    Report errors: Correctable- Non-Fatal- Fatal-
>>>> Unsupported-
>>>>             RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>>>>             MaxPayload 256 bytes, MaxReadReq 128 bytes
>>>>         DevSta:    CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr-
>>>> TransPend-
>>>>         LnkCap:    Port #2, Speed 5GT/s, Width x8, ASPM L0s L1, Latency
>>>> L0 <256ns, L1 <8us
>>>>             ClockPM- Surprise- LLActRep- BwNot+
>>>>         LnkCtl:    ASPM Disabled; RCB 64 bytes Disabled- Retrain-
>>> CommClk+
>>>>             ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>>>         LnkSta:    Speed 5GT/s, Width x8, TrErr- Train- SlotClk+
>>>> DLActive- BWMgmt+ ABWMgmt-
>>>>         SltCap:    AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug-
>>>> Surprise-
>>>>             Slot #1, PowerLimit 75.000W; Interlock- NoCompl+
>>>>         SltCtl:    Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt-
>>>> HPIrq- LinkChg-
>>>>             Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
>>>>         SltSta:    Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+
>>>> Interlock-
>>>>             Changed: MRL- PresDet+ LinkState-
>>>>         RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna-
>>>> CRSVisible-
>>>>         RootCap: CRSVisible-
>>>>         RootSta: PME ReqID 0000, PMEStatus- PMEPending-
>>>>         DevCap2: Completion Timeout: Not Supported, TimeoutDis- ARIFwd-
>>>>         DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
>>>>         LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-,
>>>> Selectable De-emphasis: -3.5dB
>>>>              Transmit Margin: Normal Operating Range,
>>>> EnterModifiedCompliance- ComplianceSOS-
>>>>              Compliance De-emphasis: -6dB
>>>>         LnkSta2: Current De-emphasis Level: -3.5dB,
>>>> EqualizationComplete-, EqualizationPhase1-
>>>>              EqualizationPhase2-, EqualizationPhase3-,
>>>> LinkEqualizationRequest-
>>>>     Capabilities: [100 v1] Virtual Channel
>>>>         Caps:    LPEVC=0 RefClk=100ns PATEntryBits=1
>>>>         Arb:    Fixed- WRR32- WRR64- WRR128-
>>>>         Ctrl:    ArbSelect=Fixed
>>>>         Status:    InProgress-
>>>>         VC0:    Caps:    PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
>>>>             Arb:    Fixed+ WRR32- WRR64- WRR128- TWRR128- WRR256-
>>>>             Ctrl:    Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
>>>>             Status:    NegoPending- InProgress-
>>>>     Capabilities: [140 v1] Root Complex Link
>>>>         Desc:    PortNumber=02 ComponentID=01 EltType=Config
>>>>         Link0:    Desc:    TargetPort=00 TargetComponent=01 AssocRCRB-
>>>> LinkType=MemMapped LinkValid+
>>>>             Addr:    00000000fed19000
>>>>     Kernel driver in use: pcieport
>>>>
>>>> 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core
>>>> processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx+
>>>>     Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0
>>>>     Interrupt: pin A routed to IRQ 46
>>>>     Region 0: Memory at c1000000 (64-bit, non-prefetchable) [size=4M]
>>>>     Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M]
>>>>     Region 4: I/O ports at 4000 [size=64]
>>>>     Expansion ROM at <unassigned> [disabled]
>>>>     Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>>>>         Address: fee00018  Data: 0000
>>>>     Capabilities: [d0] Power Management version 2
>>>>         Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
>>>> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>>>>         Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>>>     Capabilities: [a4] PCI Advanced Features
>>>>         AFCap: TP+ FLR+
>>>>         AFCtrl: FLR-
>>>>         AFStatus: TP-
>>>>     Kernel driver in use: i915
>>>>
>>>> 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series
>>>> Chipset Family MEI Controller #1 (rev 04)
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx+
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0
>>>>     Interrupt: pin A routed to IRQ 48
>>>>     Region 0: Memory at c1614000 (64-bit, non-prefetchable) [size=16]
>>>>     Capabilities: [50] Power Management version 3
>>>>         Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>>>> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>>>         Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
>>>>     Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>>>         Address: 00000000fee003b8  Data: 0000
>>>>     Kernel driver in use: mei_me
>>>>
>>>> 00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset
>>>> Family PCI Express Root Port 1 (rev c4) (prog-if 00 [Normal decode])
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx-
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0, Cache Line Size: 64 bytes
>>>>     Bus: primary=00, secondary=07, subordinate=07, sec-latency=0
>>>>     I/O behind bridge: 00002000-00002fff
>>>>     Memory behind bridge: fff00000-000fffff
>>>>     Prefetchable memory behind bridge: 00000000c1400000-00000000c14fffff
>>>>     Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort+ <SERR- <PERR-
>>>>     BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
>>>>         PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>>>     Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
>>>>         DevCap:    MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns,
>>>> L1 <1us
>>>>             ExtTag- RBE+ FLReset-
>>>>         DevCtl:    Report errors: Correctable- Non-Fatal- Fatal-
>>>> Unsupported-
>>>>             RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>>>>             MaxPayload 128 bytes, MaxReadReq 128 bytes
>>>>         DevSta:    CorrErr+ UncorrErr- FatalErr- UnsuppReq- AuxPwr+
>>>> TransPend-
>>>>         LnkCap:    Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency
>>>> L0 <512ns, L1 <16us
>>>>             ClockPM- Surprise- LLActRep+ BwNot-
>>>>         LnkCtl:    ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain-
>>> CommClk+
>>>>             ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>>>         LnkSta:    Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
>>>> DLActive+ BWMgmt+ ABWMgmt-
>>>>         SltCap:    AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug-
>>>> Surprise-
>>>>             Slot #0, PowerLimit 10.000W; Interlock- NoCompl+
>>>>         SltCtl:    Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt-
>>>> HPIrq- LinkChg-
>>>>             Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
>>>>         SltSta:    Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+
>>>> Interlock-
>>>>             Changed: MRL- PresDet+ LinkState+
>>>>         RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna-
>>>> CRSVisible-
>>>>         RootCap: CRSVisible-
>>>>         RootSta: PME ReqID 0000, PMEStatus- PMEPending-
>>>>         DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
>>>>         DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
>>>>         LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-,
>>>> Selectable De-emphasis: -6dB
>>>>              Transmit Margin: Normal Operating Range,
>>>> EnterModifiedCompliance- ComplianceSOS-
>>>>              Compliance De-emphasis: -6dB
>>>>         LnkSta2: Current De-emphasis Level: -3.5dB,
>>>> EqualizationComplete-, EqualizationPhase1-
>>>>              EqualizationPhase2-, EqualizationPhase3-,
>>>> LinkEqualizationRequest-
>>>>     Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
>>>>         Address: 00000000  Data: 0000
>>>>     Capabilities: [90] Subsystem: Dell Device 05b8
>>>>     Capabilities: [a0] Power Management version 2
>>>>         Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>>>> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>>>         Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>>>     Kernel driver in use: pcieport
>>>>
>>>> 00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset
>>>> Family PCI Express Root Port 2 (rev c4) (prog-if 00 [Normal decode])
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx-
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0, Cache Line Size: 64 bytes
>>>>     Bus: primary=00, secondary=08, subordinate=08, sec-latency=0
>>>>     I/O behind bridge: 0000f000-00000fff
>>>>     Memory behind bridge: c1500000-c15fffff
>>>>     Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
>>>>     Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- <SERR- <PERR-
>>>>     BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
>>>>         PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>>>>     Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
>>>>         DevCap:    MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns,
>>>> L1 <1us
>>>>             ExtTag- RBE+ FLReset-
>>>>         DevCtl:    Report errors: Correctable- Non-Fatal- Fatal-
>>>> Unsupported-
>>>>             RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
>>>>             MaxPayload 128 bytes, MaxReadReq 128 bytes
>>>>         DevSta:    CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+
>>>> TransPend-
>>>>         LnkCap:    Port #2, Speed 5GT/s, Width x1, ASPM L0s L1, Latency
>>>> L0 <512ns, L1 <16us
>>>>             ClockPM- Surprise- LLActRep+ BwNot-
>>>>         LnkCtl:    ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain-
>>> CommClk+
>>>>             ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>>>         LnkSta:    Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
>>>> DLActive+ BWMgmt+ ABWMgmt-
>>>>         SltCap:    AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug-
>>>> Surprise-
>>>>             Slot #1, PowerLimit 10.000W; Interlock- NoCompl+
>>>>         SltCtl:    Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt-
>>>> HPIrq- LinkChg-
>>>>             Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock-
>>>>         SltSta:    Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+
>>>> Interlock-
>>>>             Changed: MRL- PresDet- LinkState-
>>>>         RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna-
>>>> CRSVisible-
>>>>         RootCap: CRSVisible-
>>>>         RootSta: PME ReqID 0000, PMEStatus- PMEPending-
>>>>         DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd-
>>>>         DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd-
>>>>         LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-,
>>>> Selectable De-emphasis: -6dB
>>>>              Transmit Margin: Normal Operating Range,
>>>> EnterModifiedCompliance- ComplianceSOS-
>>>>              Compliance De-emphasis: -6dB
>>>>         LnkSta2: Current De-emphasis Level: -3.5dB,
>>>> EqualizationComplete-, EqualizationPhase1-
>>>>              EqualizationPhase2-, EqualizationPhase3-,
>>>> LinkEqualizationRequest-
>>>>     Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
>>>>         Address: 00000000  Data: 0000
>>>>     Capabilities: [90] Subsystem: Dell Device 05b8
>>>>     Capabilities: [a0] Power Management version 2
>>>>         Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>>>> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>>>>         Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>>>     Kernel driver in use: pcieport
>>>>
>>>> 00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC
>>>> Controller (rev 04)
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx-
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0
>>>>     Capabilities: [e0] Vendor Specific Information: Len=0c <?>
>>>>     Kernel driver in use: lpc_ich
>>>>
>>>>
>>>> 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family
>>>> SMBus Controller (rev 04)
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx-
>>>>     Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Interrupt: pin C routed to IRQ 0
>>>>     Region 0: Memory at c1615000 (64-bit, non-prefetchable) [size=256]
>>>>     Region 4: I/O ports at 4040 [size=32]
>>>>
>>>> 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
>>>> [AMD/ATI] Mars [Radeon HD 8730M] (prog-if 00 [VGA controller])
>>>>     Subsystem: Dell Device 05b8
>>>>     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>>>> Stepping- SERR- FastB2B- DisINTx+
>>>>     Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
>>>> <TAbort- <MAbort- >SERR- <PERR- INTx-
>>>>     Latency: 0, Cache Line Size: 64 bytes
>>>>     Interrupt: pin A routed to IRQ 47
>>>>     Region 0: Memory at a0000000 (64-bit, prefetchable) [size=256M]
>>>>     Region 2: Memory at c0000000 (64-bit, non-prefetchable) [size=256K]
>>>>     Region 4: I/O ports at 3000 [size=256]
>>>>     Expansion ROM at c0040000 [disabled] [size=128K]
>>>>     Capabilities: [48] Vendor Specific Information: Len=08 <?>
>>>>     Capabilities: [50] Power Management version 3
>>>>         Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
>>>> PME(D0-,D1+,D2+,D3hot+,D3cold-)
>>>>         Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>>>>     Capabilities: [58] Express (v2) Legacy Endpoint, MSI 00
>>>>         DevCap:    MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us,
>>>> L1 unlimited
>>>>             ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
>>>>         DevCtl:    Report errors: Correctable- Non-Fatal- Fatal-
>>>> Unsupported-
>>>>             RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
>>>>             MaxPayload 256 bytes, MaxReadReq 512 bytes
>>>>         DevSta:    CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr-
>>>> TransPend-
>>>>         LnkCap:    Port #0, Speed 5GT/s, Width x8, ASPM L0s L1, Latency
>>>> L0 <64ns, L1 <1us
>>>>             ClockPM- Surprise- LLActRep- BwNot-
>>>>         LnkCtl:    ASPM Disabled; RCB 64 bytes Disabled- Retrain-
>>> CommClk+
>>>>             ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
>>>>         LnkSta:    Speed 5GT/s, Width x8, TrErr- Train- SlotClk+
>>>> DLActive- BWMgmt- ABWMgmt-
>>>>         DevCap2: Completion Timeout: Not Supported, TimeoutDis-
>>>>         DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
>>>>         LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-,
>>>> Selectable De-emphasis: -6dB
>>>>              Transmit Margin: Normal Operating Range,
>>>> EnterModifiedCompliance- ComplianceSOS-
>>>>              Compliance De-emphasis: -6dB
>>>>         LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-,
>>>> EqualizationPhase1-
>>>>              EqualizationPhase2-, EqualizationPhase3-,
>>>> LinkEqualizationRequest-
>>>>     Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>>>         Address: 00000000fee00398  Data: 0000
>>>>     Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1
>>>> Len=010 <?>
>>>>     Capabilities: [150 v2] Advanced Error Reporting
>>>>         UESta:    DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
>>>> RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>         UEMsk:    DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
>>>> RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
>>>>         UESvrt:    DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt-
>>>> RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
>>>>         CESta:    RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>>>>         CEMsk:    RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
>>>>         AERCap:    First Error Pointer: 00, GenCap+ CGenEn- ChkCap+
>>> ChkEn-
>>>>     Capabilities: [270 v1] #19
>>>>     Kernel driver in use: radeon
>>>>
>>>>
>>>>
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>>>> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
>>>>
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>>>>
>>>> _______________________________________________
>>>> Intel-gfx mailing list
>>>> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>>>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>>
>>> --
>>> Jani Nikula, Intel Open Source Technology Center
>>>
>

Well, I can reproduce the problem just with the option
acpi_backlight=vendor which is needed if i want to toggle brightness
When I reported the problem I have been advised to create a bug
report to make sure the "possible quirks made to make work the
brightness" are integrated upstream, so that we can then refocus on
the sleep/resume crash

so the timeline is:
- - I report the crash/resume bug and get redirected to creating a
video bug instead
- - I report the video bug and get redirected to sending the
information to involved people/dev because it's an upstream bug
- - I report the problem here and I'm advised to use
"acpi_backlight=vendor" to fix the problem

so I'm a bit confused about what I should do now :-)
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