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Hello, I posted the below request to the user support list, but no interest there. http://mailman.linux-thinkpad.org/pipermail/linux-thinkpad/2010-December/049149.html On 30.11.2010 13:01, linux-thinkpad-request@xxxxxxxxxxxxxxxxxx wrote: > Hello, > > I have a problem with the backlight of my T510i running Ubuntu 10.10, > all other ACPI functions on this computer seem to work as usual. The > brightness setting does not respond to hotkeys or power saving settings, > neither manually echoing settings to > /sys/class/backlight/acpi_video0/brightness. The brightness is normally > at maximum, but sometimes very dim, only suspend/wakeup cycle will > restore it to maximum. > > Echo and hotkey change the value in the sys file but have no real effect. Replying to myself: I tried loading thinkpad_acpi with forced backlight control. /sys/class/backlight/thinkpad_screen tree appears and works with hotkeys but no actual brightness change this way either. [31962.708349] thinkpad_acpi: ThinkPad ACPI Extras v0.24 [31962.708354] thinkpad_acpi: http://ibm-acpi.sf.net/ [31962.708356] thinkpad_acpi: ThinkPad BIOS 6MET61WW (1.24 ), EC 6MHT38WW-1.13 [31962.708359] thinkpad_acpi: Lenovo ThinkPad T510, model 43149VG [31962.709858] thinkpad_acpi: detected a 16-level brightness capable ThinkPad [31962.710211] thinkpad_acpi: radio switch found; radios are enabled [31962.710230] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver [31962.710233] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... [31962.720122] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [31962.725961] thinkpad_acpi: rfkill switch tpacpi_wwan_sw: radio is unblocked [31962.726445] Registered led device: tpacpi::thinklight [31962.726545] Registered led device: tpacpi::power [31962.726794] Registered led device: tpacpi::standby [31962.726904] Registered led device: tpacpi::thinkvantage [31962.732634] thinkpad_acpi: Backlight control force enabled, even if standard ACPI backlight interface is available [31962.735613] thinkpad_acpi: Console audio control enabled, mode: monitor (read only) [31962.741476] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input23 lsmod output: Module Size Used by mt2060 4118 0 af9013 19970 0 dvb_usb_af9015 24754 0 dvb_usb 14597 1 dvb_usb_af9015 dvb_core 88505 1 dvb_usb nls_utf8 1069 0 isofs 30022 0 thinkpad_acpi 67659 0 nls_iso8859_1 3261 0 nls_cp437 4931 0 vfat 9201 0 fat 48240 1 vfat usb_storage 40204 0 aes_i586 7280 0 aes_generic 26875 1 aes_i586 binfmt_misc 6599 1 parport_pc 26378 0 ppdev 5556 0 nvidia 9331115 45 rfcomm 33811 0 sco 7998 0 bnep 9542 0 snd_hda_codec_nvhdmi 13615 4 l2cap 37008 4 rfcomm,bnep btusb 11001 0 bluetooth 50500 5 rfcomm,sco,bnep,l2cap,btusb hdaps 9008 1 thinkpad_ec 5554 1 hdaps arc4 1165 2 snd_hda_codec_conexant 29939 1 iwlagn 179815 0 joydev 8735 0 snd_hda_intel 22203 2 iwlcore 127479 1 iwlagn snd_hda_codec 87552 3 snd_hda_codec_nvhdmi,snd_hda_codec_conexant,snd_hda_intel snd_seq_midi 4588 0 snd_hwdep 5040 1 snd_hda_codec snd_pcm 71603 2 snd_hda_intel,snd_hda_codec snd_rawmidi 17783 1 snd_seq_midi mac80211 231541 2 iwlagn,iwlcore snd_page_alloc 7216 2 snd_hda_intel,snd_pcm snd_seq_midi_event 6047 1 snd_seq_midi snd_seq 47174 2 snd_seq_midi,snd_seq_midi_event snd_timer 19067 2 snd_pcm,snd_seq snd_seq_device 5744 3 snd_seq_midi,snd_rawmidi,snd_seq qcserial 3484 0 cfg80211 144470 3 iwlagn,iwlcore,mac80211 intel_agp 26784 0 agpgart 32075 2 nvidia,intel_agp video 18712 0 output 1883 1 video tpm_tis 7658 0 uvcvideo 55911 0 videodev 43098 1 uvcvideo snd 49006 14 thinkpad_acpi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_rawmidi,snd_pcm,snd_seq,snd_timer,snd_seq_device usb_wwan 9953 1 qcserial soundcore 880 1 snd tpm 13741 1 tpm_tis v4l1_compat 13359 2 uvcvideo,videodev intel_ips 11101 0 usbserial 33100 2 qcserial,usb_wwan nvram 6342 1 thinkpad_acpi lp 7342 0 tpm_bios 5310 1 tpm psmouse 59033 0 parport 31492 3 parport_pc,ppdev,lp serio_raw 4022 0 usbhid 36978 0 hid 67742 1 usbhid e1000e 133436 0 firewire_ohci 21394 0 ahci 19013 0 sdhci_pci 6339 0 firewire_core 46675 1 firewire_ohci sdhci 15954 1 sdhci_pci libahci 21731 3 ahci led_class 2633 2 thinkpad_acpi,sdhci crc_itu_t 1383 1 firewire_core Please help? Jussi |
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