Open GoogleCodeExporter opened 9 years ago
I confirm the above. Same behavior with Vaio F11M1E (GeForce GT 330M) and
1) ArchLinux + xf86-video-nouveau 0.0.16_git20110316-2
2) Pure Debian Wheezy + xserver-xorg-video-nouveau
1:0.0.16+git20110411+8378443-1
3) Fresh install of Ubuntu 11.04
In all three cases, Fn + F5/F6 work as expected until the first suspend/resume
cycle. Then, brightness is not controlled anymore (restarting hal or acpid does
not help).
Had to resort back to nvidia which, by the way, freezes my computer on
suspend/resume with Gnome3 but works ok with Gnome3 Fallback in ArchLinux
(nvidia 270.41.06-1) and works ok with Gnome2 in Debian (nvidia 260.19.44-1)...
Original comment by georgios...@gmail.com
on 2 May 2011 at 11:49
Confirm the original report. Unlike the first reply, changing the brightness
never works, even after booting the system.
Otherwise, the notification shows up and I can set the "brightness bar" up and
down, with no visible changes to the actual screen brightness.
I'm hoping this is fixable, since the NVidia drivers seem to be causing
stability problems in my system.
Original comment by cach...@gmail.com
on 25 Jul 2011 at 3:52
Hi, I would also like to confirm this issue on a VAIO VPCF11M1E with GeForce
330m on an ArchLinux installation. Brightness is stuck on max after suspend and
cannot be controlled.
I have managed to solve it by compiling a kernel using
http://cgit.freedesktop.org/nouveau/linux-2.6/
(Note that this will be merged to mainline linux hopefully when 3.2 comes out
or later)
Using a kernel from above I just appended acpi_backlight=vendor on my kernel
command line (i.e. edit your GRUB/GRUB2/bootloader configuration and add it).
This removes the /sys/class/backlight/acpi_video0 interface and adds
/sys/class/backlight/nv_backlight and /sys/class/backlight/sony/ directories.
The former controls brightness, the latter does nothing.
Backlight Control works fine on boot and after suspend.
Unfortunately, the sony-acpid daemon for smooth backlight control is not
working for this setup but hopefully the developers that made the daemon will
add this support! :DI have already asked for that in issue 6.
Original comment by gpanta...@gmail.com
on 18 Sep 2011 at 9:18
First, thanks to gpanta...@gmail.com for the accurate information that made me
wait for 3.2 to reach the repos of Archlinux.
FYI, now, brightness works as expected with nouveau and kernel 3.2.4-1. Soon,
the same will be true for Debian testing (currently at 3.1.0-1).
Original comment by georgios...@gmail.com
on 7 Feb 2012 at 11:27
Testing this on Precise with linux-image-3.2.0-19.31 (3.2.12) and
xserver-xorg-video-nouveau-1:0.0.16+git20111201+b5534a1-1build2 and a VPCS11E7E.
As gpanta... says, with acpi_backlight=vendor nv_backlight replaces acpi_video0
and monitor backlight can be set echoing the value (from 0 to 100), however Fn
+ F5/F6 does nothing at all (no OSD as well). OSD worked without
acpi_backlight=vendor, but of course no backlight changes.
Original comment by shibo...@gmail.com
on 22 Mar 2012 at 11:00
Original issue reported on code.google.com by
amue...@hotmail.com
on 2 May 2011 at 4:01