On Tue, Feb 16, 2016 at 09:26:35AM -0800, Andy Lutomirski wrote: > On Tue, Feb 16, 2016 at 9:12 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: > > On Tue, Feb 16, 2016 at 8:12 AM, Daniel Vetter <daniel@xxxxxxxx> wrote: > >> On Mon, Feb 15, 2016 at 06:58:33AM -0800, Andy Lutomirski wrote: > >>> On Sun, Feb 14, 2016 at 6:59 PM, Andy Lutomirski <luto@xxxxxxxxxx> wrote: > >>> > Hi- > >>> > > >>> > On 4.5-rc3 on a Dell XPS 13 9350 (Skylake i915, no nvidia on this > >>> > model), shortly after resume, I saw a single black flash on the > >>> > screen. The log said: > >>> > > >>> > [Feb13 07:05] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* > >>> > CPU pipe A FIFO underrun > >>> > > >>> > I haven't seen this on 4.4. > >>> > > >>> > I'd be happy to dig up debugging info, but I don't know what would be > >>> > useful. I have no i915 module options set. > >>> > >>> It's flashing quite frequently now, although I seem to get the > >>> underrun warning only once per resume. > >> > >> We shut up the warning irq source to avoid hijacking an entire cpu core > >> ;-) > >> > >> There's a fix from Matt right after 4.5-rc4 in Linus' branch. I'm hoping > >> that should help. > > > > Do you mean: > > > > commit e2e407dc093f530b771ee8bf8fe1be41e3cea8b3 > > Author: Matt Roper <matthew.d.roper@xxxxxxxxx> > > Date: Mon Feb 8 11:05:28 2016 -0800 > > > > drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2) > > > > If so, it didn't help. I'm currently doing a full rebuild just in > > case I messed something up, though. > > > > Definitely not fixed. It seems to be okay after a reboot until the > first suspend/resume. > > This happened after resuming. Five cents says it's the root cause. That's interesting, but doesn't ring a bell unfortunately. Can you try to attempt a bisect? Thanks, Daniel > > [ 160.361200] WARNING: CPU: 2 PID: 2512 at > drivers/gpu/drm/i915/intel_uncore.c:599 > hsw_unclaimed_reg_debug+0x69/0x90 [i915]() > [ 160.361209] Unclaimed register detected before writing to register 0x20a8 > [ 160.361213] Modules linked in: rfcomm fuse ccm cmac xt_CHECKSUM > ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns > nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 > xt_conntrack ebtable_filter ebtable_nat ebtable_broute bridge stp llc > ebtables ip6table_raw ip6table_mangle ip6table_security ip6table_nat > nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter > ip6_tables iptable_raw iptable_mangle iptable_security iptable_nat > nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bnep > arc4 iwlmvm mac80211 snd_hda_codec_hdmi snd_hda_codec_realtek > hid_multitouch snd_hda_codec_generic iwlwifi snd_hda_intel intel_rapl > snd_hda_codec x86_pkg_temp_thermal coretemp kvm_intel snd_hwdep > cfg80211 snd_hda_core kvm snd_seq uvcvideo snd_seq_device > i2c_designware_platform > [ 160.361385] i2c_designware_core btusb snd_pcm videobuf2_vmalloc > wmi_mof vfat dell_wmi fat videobuf2_memops btrtl btbcm btintel > bluetooth dell_laptop dell_smbios dcdbas videobuf2_v4l2 snd_timer > videobuf2_core rtsx_pci_ms snd irqbypass videodev memstick > ghash_clmulni_intel joydev mei_me efi_pstore mei i2c_i801 soundcore > efivars pcspkr idma64 shpchp virt_dma media rfkill intel_lpss_pci > processor_thermal_device intel_soc_dts_iosf wmi acpi_als kfifo_buf > int3403_thermal tpm_tis industrialio pinctrl_sunrisepoint tpm > intel_hid int3400_thermal pinctrl_intel intel_lpss_acpi sparse_keymap > int340x_thermal_zone acpi_thermal_rel intel_lpss nfsd acpi_pad > auth_rpcgss nfs_acl lockd binfmt_misc grace sunrpc dm_crypt i915 > i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt > fb_sys_fops drm rtsx_pci_sdmmc > [ 160.361548] mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel > rtsx_pci serio_raw i2c_hid video > [ 160.361575] CPU: 2 PID: 2512 Comm: gnome-shell Not tainted > 4.5.0-rc4-acpi+ #59 > [ 160.361581] Hardware name: Dell Inc. XPS 13 9350/07TYC2, BIOS 1.1.9 > 12/18/2015 > [ 160.361588] 0000000000000086 00000000604232f7 ffff88024d55ba60 > ffffffff81449d83 > [ 160.361601] ffff88024d55baa8 ffffffffa01e15e8 ffff88024d55ba98 > ffffffff81094252 > [ 160.361612] ffff88026f4d0000 00000000000020a8 ffff88026f4d0000 > 00000000fffffefe > [ 160.361624] Call Trace: > [ 160.361644] [<ffffffff81449d83>] dump_stack+0x65/0x92 > [ 160.361660] [<ffffffff81094252>] warn_slowpath_common+0x82/0xc0 > [ 160.361671] [<ffffffff810942ec>] warn_slowpath_fmt+0x5c/0x80 > [ 160.361764] [<ffffffffa0158469>] hsw_unclaimed_reg_debug+0x69/0x90 [i915] > [ 160.361844] [<ffffffffa015b71e>] gen9_write32+0x6e/0x390 [i915] > [ 160.361855] [<ffffffff810b86a5>] ? preempt_count_add+0x85/0xd0 > [ 160.361939] [<ffffffffa014d955>] gen8_logical_ring_get_irq+0x95/0xe0 [i915] > [ 160.362017] [<ffffffffa013b4db>] __i915_wait_request+0x58b/0x650 [i915] > [ 160.362028] [<ffffffff810d7380>] ? wake_atomic_t_function+0x70/0x70 > [ 160.362113] [<ffffffffa013b70e>] > i915_gem_object_wait_rendering__nonblocking+0x16e/0x2c0 [i915] > [ 160.362200] [<ffffffffa0141c34>] ? i915_gem_pwrite_ioctl+0xe4/0x9b0 [i915] > [ 160.362211] [<ffffffff810b86a5>] ? preempt_count_add+0x85/0xd0 > [ 160.362225] [<ffffffff81857486>] ? _raw_write_unlock+0x16/0x30 > [ 160.362312] [<ffffffffa013eed9>] i915_gem_set_domain_ioctl+0x99/0x160 [i915] > [ 160.362357] [<ffffffffa00887c2>] drm_ioctl+0x152/0x540 [drm] > [ 160.362439] [<ffffffffa013ee40>] ? > i915_gem_object_set_to_gtt_domain+0x180/0x180 [i915] > [ 160.362456] [<ffffffff813d30bd>] ? selinux_file_ioctl+0x11d/0x200 > [ 160.362469] [<ffffffff81240521>] do_vfs_ioctl+0xa1/0x5b0 > [ 160.362480] [<ffffffff81852c5d>] ? __schedule+0x3ad/0xa80 > [ 160.362492] [<ffffffff81240aa9>] SyS_ioctl+0x79/0x90 > [ 160.362505] [<ffffffff81857bae>] entry_SYSCALL_64_fastpath+0x12/0x71 > [ 160.362515] ---[ end trace d66ecf0dd3c2adc4 ]--- > [...] > [ 249.526574] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] > *ERROR* CPU pipe A FIFO underrun -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
