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View Full Version : Lost brightness control in gnome-power-preference on F13

lovenemesis
10th March 2010, 11:37 PM
Hello everyone,

I recently upgraded to F13 GNOME 2.29.2 and I found the brightness control slider in gnome-power-preference was gone.

Moreover, all the brightness adjustment in GNOME stopped working, keyboard shortcuts, panel applet. They seemed unable to retrieve the information to perform the adjustment.

It is really serious because the LCD panel was unable to restore to the original brightness after suspend. Just leave the screen too dim to read.

However, switching to KDE does not have this problem. GNOME 2.28 in F12 is fine, too. So I assume it is a GNOME specific problem.

I filed a bug report on bugzilla. Please VOTE if you have the same problem and let me know if yours does not.

https://bugzilla.redhat.com/show_bug.cgi?id=572005

Cheers,
dd_wizard
11th March 2010, 01:44 AM
I'm running F13, Kernel 2.6.33-8.fc13.x86_64, and Gnome 2.29.92 and the brightness slider is still there. My gnome-power-preferences is from gnome-power-manager 2.29.2-1.fc13. So it's working on a Toshiba laptop running 64 bit F13 here.

dd_wizard
planetf1
11th March 2010, 08:15 PM

Failed for me too -- I think it worked initially, but an update may have killed it.

Workaround is from shell to do something like
echo 15 > /sys/devices/virtual/backlight/acpi_video0/brightness

My pm is same version -- gnome-power-manager-2.29.2-1.fc13.x86_64

I had the same problem after suspend too.

Adding vote...
lovenemesis
11th March 2010, 08:24 PM
Failed for me too -- I think it worked initially, but an update may have killed it.

Workaround is from shell to do something like
echo 15 > /sys/devices/virtual/backlight/acpi_video0/brightness

My pm is same version -- gnome-power-manager-2.29.2-1.fc13.x86_64

I had the same problem after suspend too.

Adding vote...

Mine is worse. It does not even work on 32bit Alpha LiveCD. I tried 64bit, the same issue.

Thanks for voting and workaround. Let us hope future developers are aware of this issue.
carlainz
12th March 2010, 09:14 AM
hi same problem for me
lovenemesis
12th March 2010, 02:23 PM
Michal Schmidt provides a fix build with revert HAL removal:

http://koji.fedoraproject.org/koji/buildinfo?buildID=161370

Sadly, it did not work for me on i686. But it's worth to try.

---------- Post added at 10:23 PM CST ---------- Previous post was at 09:08 PM CST ----------

Err, I did not notice the m1 tag for the scratch build.

Now it works ! Please check the following link for a fix gnome-power-manager build:

x86_64: http://koji.fedoraproject.org/koji/taskinfo?taskID=2048364
i686: http://koji.fedoraproject.org/koji/taskinfo?taskID=2048407