Hi, On my thinkpad T400, by default I can set LCD brightness by Fn+home/end shortcut, no need to manually set hotkeys. I have acpi package installed. On Fri, Apr 17, 2009 at 11:35 AM, Sergey Manucharian wrote:

On Thu, 16 Apr 2009 22:13:15 -0400 Adam Stokes wrote:

...

So pressing the fn home/end for brightness alters :

/proc/acpi/video/VID/LCD0/brightness

doing an:

echo '100' >/proc/acpi/video/VID/LCD0/brightness

My .config for the kernel is set to:

CONFIG_THINKPAD_ACPI_VIDEO=y CONFIG_VIDEO_OUTPUT_CONTROL=m CONFIG_ACPI_VIDEO=m

lsmod shows:

thinkpad_acpi          70316  0 rfkill                 11444  4 iwl3945,thinkpad_acpi led_class               4344  3 iwl3945,sdhci,thinkpad_acpi nvram                   7868  1 thinkpad_acpi

dmesg shows: thinkpad_acpi: ThinkPad ACPI Extras v0.22 thinkpad_acpi: http://ibm-acpi.sf.net/ thinkpad_acpi: ThinkPad BIOS 7LETA7WW (2.07 ), EC 7KHT24WW-1.08 thinkpad_acpi: Lenovo ThinkPad T61, model 6464Y1E thinkpad_acpi: ACPI backlight control delay disabled thinkpad_acpi: radio switch found; radios are enabled thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... thinkpad_acpi: Standard ACPI backlight interface available, not loading native one.

kernel is 2.6.29-ARCH

anyone know why the brightness still refuses to work?

Hi Adam,

I'm using brightness control buttons every day with my ThinkPad R61. Both

 echo '100' >/proc/acpi/video/VID/LCD0/brightness  echo 15 > /sys/class/backlight/acpi_video0/brightness

work for me. "xev" shows the following:

 keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp)  keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown)

I've updated the system yesterday, but brightness control works fine for long time. I used to use custom scripts launched from /etc/acpi/handler.sh long time ago since the the regular buttons did not work properly.

You may want to add:

 keycode 233 = XF86MonBrightnessUp  keycode 232 = XF86MonBrightnessDown

to your ~/.Xmodmap file (though I haven't, but check with "xev")

Cheers, Sergey

-- Best regards, Li Ye

Another weird thing I noticed was I can actually set the brightness with the keys all the way up until the grub screen. But after that they fail to work. On Fri, Apr 17, 2009 at 9:47 AM, Adam Stokes wrote:

On Thu, Apr 16, 2009 at 11:35 PM, Sergey Manucharian wrote:

...

Hi Adam,

I'm using brightness control buttons every day with my ThinkPad R61. Both

 echo '100' >/proc/acpi/video/VID/LCD0/brightness  echo 15 > /sys/class/backlight/acpi_video0/brightness

work for me. "xev" shows the following:

 keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp)  keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown)

I've updated the system yesterday, but brightness control works fine for long time. I used to use custom scripts launched from /etc/acpi/handler.sh long time ago since the the regular buttons did not work properly.

You may want to add:

 keycode 233 = XF86MonBrightnessUp  keycode 232 = XF86MonBrightnessDown

to your ~/.Xmodmap file (though I haven't, but check with "xev")

Cheers, Sergey

Hi Sergey,

Thanks for the information, I did add those keycodes to my .Xmodmap with no change unfortunately. I also installed the acpi/acpid packages but I haven't actually rebooted yet since it seems that acpid will not run due to some devices being in use at the moment.

If there are anymore ideas I would like to hear them.

Thanks!

-- ( adam stokes ) || ( adam.stokes@gmail.com )

-- ( adam stokes ) || ( adam.stokes@gmail.com )

On Fri, Apr 17, 2009 at 10:27 AM, Sergey Manucharian wrote:

On Fri, 17 Apr 2009 09:47:38 -0400 Adam Stokes wrote:

...

Thanks for the information, I did add those keycodes to my .Xmodmap with no change unfortunately. I also installed the acpi/acpid packages but I haven't actually rebooted yet since it seems that acpid will not run due to some devices being in use at the moment.

If there are anymore ideas I would like to hear them.

When long time ago I had a similar problem I've added the following into the main "case" structure in "/etc/acpi/handler.sh":

---------------------------8<------------------------------- video)   case "$2" in   LCD0) case "$3" in         00000086) /usr/local/bin/brightness_up ;;         00000087) /usr/local/bin/brightness_down ;;                *) logger "LCD0 button undefined: $1 $2 $3 $4" ;;         esac ;;   *) logger "Video button undefined: $1 $2 $3 $4" ;;   esac ;; ---------------------------8<------------------------------- I really don't remember what "00000086" and "00000087" stand for. The brightness changing scripts are below.

"/usr/local/bin/brightness_up": ---------------------------8<------------------------------- #!/bin/bash # LCD brightness up declare -i BRIGHT let BRIGHT=`cat /sys/class/backlight/acpi_video0/actual_brightness`+1 if [ "$BRIGHT" -gt 15 ]; then  BRIGHT=15 fi echo $BRIGHT > /sys/class/backlight/acpi_video0/brightness ---------------------------8<-------------------------------

and "/usr/local/bin/brightness_down": ---------------------------8<------------------------------- #!/bin/bash # LCD brightness down declare -i BRIGHT let BRIGHT=`cat /sys/class/backlight/acpi_video0/actual_brightness`-1 if [ "$BRIGHT" -lt 0 ]; then  BRIGHT=0 fi echo $BRIGHT > /sys/class/backlight/acpi_video0/brightness ---------------------------8<-------------------------------

Cheers, Sergey

Thanks I'll give it a shot though it looks to me like this is just another way of doing: echo # >/sys/class/backlight/acpi_video0/brightness Thanks again -- ( adam stokes ) || ( adam.stokes@gmail.com )

Hm, strange, works fine here on t61p , standard archlinux kernel, nothing out of the ordinary. On Tue, Apr 28, 2009 at 3:36 PM, Michael Schaefer wrote:

I've similar problem here with my X60s.

echo 'up' >! /proc/acpi/ibm/brightness

works fine but using the hotkeys has no effect. I now realized that xev doesn't return a keycode for FN+HOME and FN+END at all. FN only gives a keycode as well as HOME and END on its own do.

However, i'm using Vanilla, so don't expect this to be an arch related problem. AFAIK things concerning brightness adjustment changed for 2.6.29 in the acpi/video branch.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=...

did anyone solve the problem?

regards - Michael

On 17.04.2009 04:13, Adam Stokes wrote:

...

So pressing the fn home/end for brightness alters :

/proc/acpi/video/VID/LCD0/brightness

doing an:

echo '100' >/proc/acpi/video/VID/LCD0/brightness

My .config for the kernel is set to:

CONFIG_THINKPAD_ACPI_VIDEO=y CONFIG_VIDEO_OUTPUT_CONTROL=m CONFIG_ACPI_VIDEO=m

lsmod shows:

thinkpad_acpi 70316 0 rfkill 11444 4 iwl3945,thinkpad_acpi led_class 4344 3 iwl3945,sdhci,thinkpad_acpi nvram 7868 1 thinkpad_acpi

dmesg shows: thinkpad_acpi: ThinkPad ACPI Extras v0.22 thinkpad_acpi: http://ibm-acpi.sf.net/ thinkpad_acpi: ThinkPad BIOS 7LETA7WW (2.07 ), EC 7KHT24WW-1.08 thinkpad_acpi: Lenovo ThinkPad T61, model 6464Y1E thinkpad_acpi: ACPI backlight control delay disabled thinkpad_acpi: radio switch found; radios are enabled thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... thinkpad_acpi: Standard ACPI backlight interface available, not loading native one.

kernel is 2.6.29-ARCH

anyone know why the brightness still refuses to work?

-- http://divineintervention.no

On Wed, Apr 29, 2009 at 11:22 AM, Damjan Georgievski wrote:

...

I've similar problem here with my X60s.

echo 'up' >! /proc/acpi/ibm/brightness

works fine but using the hotkeys has no effect. I now realized that xev doesn't return a keycode for FN+HOME and FN+END at all. FN only gives a keycode as well as HOME and END on its own do.

However, i'm using Vanilla, so don't expect this to be an arch related problem. AFAIK things concerning brightness adjustment changed for 2.6.29 in the acpi/video branch.

Do you have some special settings enabled?? Because you shouldn't.

on my X60s everything works fine in console and X (with any sufficiently recent intel driver - maybe 2.3 was too old - I don't remember)

-- damjan

Only way i could solve my issue was to turn up brightness during boot sequence, but once the kernel loaded all brightness functions keys stopped working. No special settings used, and the default arch 2.6.29 kernel installed. -- ( adam stokes ) || ( adam.stokes@gmail.com )