I have problem using linux OS to adjust my video brightness using the FN+F7 and FN+F8 and every time start up it automatically set the LCD to the lowest level. I can change the brightness with echo. And here is my cat info from the terminal. laptop:~# cat '/proc/acpi/video/GFX0/DD03/brightness' levels: 13 25 38 50 63 75 88 100 current: 50 I tried with this unoffical fix but not working any more. http://ubuntuforums.org/showthread.php?t=881241 I wish next kernel can add my laptop brightness fix. Thank you for ur time. If u need more detail pls let me know.
BY THE WAY I`M USING GL960+ICH8 BASED LAPTOP.
From the description it seems that the brightness can be adjusted by using the /sys/class/backlight/acpi_video*/brightness Will you please do the following test? 1. kill the process using /proc/acpi/event (use the command of "lsof /proc/acpi/event" to get the process id) 2. cat /proc/acpi/event >event_log 3. press "Fn + F7"/"Fn + F8" several times and then press "CTRL + C" After the test, please attach the file of event_log. thanks.
please attach the acpidump output. and attach the output of "grep . /sys/firmware/acpi/interrupts/*", both before and after pressing the Fn + F7/F8 hotkeys.
*** Bug 15627 has been marked as a duplicate of this bug. ***
Created attachment 25721 [details] output of "grep . /sys/firmware/acpi/interrupts/*" @Zhang Rui Here is the info u ask for. Please check into it.
(In reply to comment #4) > *** Bug 15627 has been marked as a duplicate of this bug. *** I have attached the grep output u asked for.
(In reply to comment #2) > From the description it seems that the brightness can be adjusted by using > the > /sys/class/backlight/acpi_video*/brightness > > Will you please do the following test? > 1. kill the process using /proc/acpi/event (use the command of "lsof > /proc/acpi/event" to get the process id) > 2. cat /proc/acpi/event >event_log > 3. press "Fn + F7"/"Fn + F8" several times and then press "CTRL + C" > > After the test, please attach the file of event_log. > > thanks. @ykzhao Thanks for the fast reply. But I still cannot cat the event log file. It returns resource busy. How to kill the process?
I got this info back when I run the lsof command. Output information may be incomplete. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME acpid 4957 root 3r REG 0,3 0 4026531938 /proc/acpi/event
I ran that command again the id changed and occurred a warning. lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/austin/.gvfs Output information may be incomplete. COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME acpid 5417 root 3r REG 0,3 0 4026531938 /proc/acpi/event
(In reply to comment #2) > From the description it seems that the brightness can be adjusted by using > the > /sys/class/backlight/acpi_video*/brightness > > Will you please do the following test? > 1. kill the process using /proc/acpi/event (use the command of "lsof > /proc/acpi/event" to get the process id) > 2. cat /proc/acpi/event >event_log > 3. press "Fn + F7"/"Fn + F8" several times and then press "CTRL + C" > > After the test, please attach the file of event_log. > > thanks. I did it again and added some command to run the cat event log file but I found it`s empty. Attached the attachments. (command line and event_log)
Created attachment 25726 [details] commond line and event_log commond line and event_log
just run "cat /proc/acpi/event" and then press the hotkey, there should be something pop up at this time.
(In reply to comment #12) > just run "cat /proc/acpi/event" and then press the hotkey, there should be > something pop up at this time. Nothing pops up. And this is what returns when hit that command. cat: /proc/acpi/event: Device or resource busy Seems a bug out there.
please run lsof /proc/acpi/event and kill all the processes that polling this file, and then do the test in comment #12.
ping...
bug closed as there is no response from the bug reporter.
(In reply to comment #16) > bug closed as there is no response from the bug reporter. Here is what I got when cating the event log while presing Fn+F7 and Fn+F8. video DD03 00000086 00000000 video DD03 00000087 00000000 video DD03 00000086 00000000 video DD03 00000086 00000000 video DD03 00000087 00000000 video DD03 00000087 00000000
Created attachment 44582 [details] event logs While pressing Fn+F7 and FN+F8 cat /proc/acpi/event results While pressing Fn+F7 and FN+F8.