Public bug reported:
Binary package hint: linux-source
1. Ubuntu version
Description: Ubuntu 8.10
Release: 8.10
2. Package version
Current: linux-image-2.6.27-11-generic (2.6.27-11.27)
Last known working: linux-image-2.6.27-9-generic (2.6.27-9.19)
3. Expected behaviour
On my Lenovo Thinkpad R61e, as root
$ cd /sys/class/backlight/acpi_video1
$ echo 0 > brightness # set brightness to lowest value
$ echo 0 > brightness # set brightness to highest value
The brightness of the LCD is expected to change with these commands.
4. Seen behaviour
Nothing happens when the commands above are executed.
5. Notes
Onder the -9 kernel, there are two acpi_videoX devices (0,1). The second
one is the one actually working. When I remove video.ko (rmmod video)
both devices disappear. Under the -11 kernel, there's only one device
and removing video.ko has no effect on it.
I will attach the necessary files later, because I'm booted under the
working kernel now.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
- Binary package hint: linux-image-2.6.27-11-generic
+ Binary package hint: linux-source
1. Ubuntu version
Description: Ubuntu 8.10
Release: 8.10
2. Package version
Current: linux-image-2.6.27-11-generic (2.6.27-11.27)
Last known working: linux-image-2.6.27-9-generic (2.6.27-9.19)
3. Expected behaviour
On my Lenovo Thinkpad R61e, as root
$ cd /sys/class/backlight/acpi_video1
$ echo 0 > brightness # set brightness to lowest value
$ echo 0 > brightness # set brightness to highest value
The brightness of the LCD is expected to change with these commands.
4. Seen behaviour
Nothing happens when the commands above are executed.
5. Notes
Onder the -9 kernel, there are two acpi_videoX devices (0,1). The second
one is the one actually working. When I remove video.ko (rmmod video)
both devices disappear. Under the -11 kernel, there's only one device
and removing video.ko has no effect on it.
I will attach the necessary files later, because I'm booted under the
working kernel now.
--
acpi brightness setting doesn't work
https://bugs.launchpad.net/bugs/325233
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