Bug 76971
| Summary: | Can't adjust brightness (Toshiba Tecra A50-A-130) | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Blindekinder (rafael.raccuia) |
| Component: | Platform_x86 | Assignee: | drivers_platform_x86 (drivers_platform_x86) |
| Status: | REOPENED --- | ||
| Severity: | normal | CC: | aaron.lu, rui.zhang |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.13.0 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: |
acpidump
acpidump dmidecode Use alternative keymap |
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Description
Blindekinder
2014-05-27 13:04:22 UTC
Created attachment 137491 [details]
acpidump
Please try this version. Also, please attach your dmi info:
# dmidecode > dmi.txt
Created attachment 137501 [details]
acpidump
Created attachment 137511 [details]
dmidecode
yes, your version works... Ping aaron... With 3.16, the default will be using intel_backlight, so I think it's already fixed with v3.16-rc1: commit 751109aad5834375ca9ed0dcfcd85a00cbf872b5 Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Date: Thu Jun 5 22:47:35 2014 +0200 ACPI / video: Change the default for video.use_native_backlight to 1 BlindeKinder, Can you please test v3.16-rc1 or a later kernel? Thanks. yes, it works with 3.16. But it doesn't auto adjust when unplugging power supply. What GUI are you using? I use Gnome-shell 3.10.4 Sounds like a lack of functionality of the GUI? I just tried MATE 1.6 on Fedora 19, when I unplug the AC adapter, the backlight is smoothly decreased to half of the current level; and when I plug the adapter, the level is restored. Though the cut it to half sounds not very good, but the GUI indeed did something on adapter plug/unplug. sorry, I reopen, I tried some things around 3.16-rc1 and brightness: impossible adjust brightness after sleep, and it wakes up with ~50%... Sounds two problems? 1 impossible adjust brightness after sleep 2 doesn't wake up from suspend to mem Correct? For 1, after resume, does the sysfs interface work? To verify: # cd /sys/class/intel_backlight # echo XXX > brightness For 2, does v3.15 resume OK? If so, it may be a regression. Please test latest Linus' tree, if problem is also there, open a new bug under the PM/Suspend/Hibernation category. Thanks. I'm not sure I understood point 2: it wakes up, but with ~50% brightness and impossible to adjust. I tried 3.16 rc 5, can't adjust at all: after boot, after sleep, even with acpi boot options (acpi_csi=Linux acpi_backlight=vendor). I misunderstood the ~50%, I thought the system doesn't wake up about ~50% of the time while you obviously mean the backlight level is ~50% after wake up. So after wakeup, does the intel_backlight interface still work? ping Sorry for the delay, I was out... I tried 3.16 final, same as comment 13. It works with intel_backlight, but now schortcuts (fn) doesn't (just like #72551): ^[[18;2~battery PNP0C0A:00 00000080 00000001 ^[[18;2~^[[18;2~battery PNP0C0A:00 00000080 00000001 ^[[18;2~battery PNP0C0A:00 00000080 00000001 battery PNP0C0A:00 00000080 00000001 ^[[17;2~battery PNP0C0A:00 00000080 00000001 ^[[17;2~^[[17;2~battery PNP0C0A:00 00000080 00000001 ^[[17;2~^[[17;2~^[[17;2~battery PNP0C0A:00 00000080 00000001 ^[[17;2~^[[17;2~^[[17;2~^[[17;2~battery PNP0C0A:00 00000080 00000001 ^[[17;2~^[[17;2~^[[17;2~battery PNP0C0A:00 00000080 00000001 Did your hotkey(fn) ever work before? Created attachment 146401 [details]
Use alternative keymap
Please test this patch, see if the hotkey works now. Apply on top of v3.16.
Sorry, I can't find info on how to apply this patch, not very familiar with kernel compilation... any suggestion? Usually, it is like this: $ git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git $ git apply the_provided_patch build kernel and test. If it doesn't apply cleanly, set tree to v3.16 first: $ git reset --hard v3.16 $ git apply the_provided_patch ok i'll try but i cant download the patch... the link goes to code browser Right click and then choose save. any update? I get an attachment.cgi file, but says: 'fatal: input [or entry?] not recognized' on apply... (my translation) ok I finally succeeded. yes, now it works, without any boot args, and also after wake up. Need more infos? No need, I'll submit that patch and cc you. commit b1bde689dde0d5de9e974390f9a0859a7ec5fd1b Author: Aaron Lu <aaron.lu@intel.com> Date: Thu Oct 23 16:18:02 2014 +0800 toshiba_acpi: Add Toshiba TECRA A50-A to the alt keymap dmi list Again on 4.4.04... Still on 14.04. |