xrandr backlight property control missing (when using KMS?)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-video-intel (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
Bug Description
Binary package hint: xserver-
xrandr is missing a backlight property:
$ xrandr --prop
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
EDID_DATA:
00fffffffffff
0013010380231
1e50540000000
0101010101015
350059c210000
0000000000000
4720446973706
004c503135365
scaling mode: Fullscreen
supported: Non-GPU Fullscreen No scale Aspect
1366x768 60.0*+
1360x768 59.8
1024x768 60.0
800x600 60.3
640x480 59.9
DVI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
xbacklight -set 10
No outputs have backlight property
The buttons on my keyboard activate the brightness control on screen but the brightness does not change.
I am using a fresh karmic install. I read something about KMS. Karmic is using KMS by default I read. It seems to be related to these posts:
http://
ProblemType: Bug
Architecture: amd64
Date: Fri Sep 11 20:42:15 2009
DistroRelease: Ubuntu 9.10
MachineType: Acer Aspire 5810T
Package: xserver-
PccardctlIdent:
PccardctlStatus:
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANGUAGE=
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
RelatedPackageV
xserver-xorg 1:7.4+3ubuntu5
libgl1-mesa-glx 7.6.0~git200908
libdrm2 2.4.13-1ubuntu1
xserver-
xserver-
SourcePackage: xserver-
Uname: Linux 2.6.31-10-generic x86_64
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/
dmi.bios.date: 06/24/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: V1.23
dmi.board.
dmi.board.name: Aspire 5810T
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.
dmi.modalias: dmi:bvnINSYDE:
dmi.product.name: Aspire 5810T
dmi.product.
dmi.sys.vendor: Acer
fglrx: Not loaded
system:
distro: Ubuntu
architecture: x86_64kernel: 2.6.31-10-generic
Changed in xserver-xorg-video-intel (Ubuntu): | |
status: | New → Confirmed |
Confirming on Acer Aspire 2920 w/ Intel 965GM, Karmic up-to-date.
When using Fn-Left or Fn-Right to adjust brightness, the bar on the screen moves, but display does not change. *).
Running "xorg --prop" is missing backlight control. However:
me@acer: /proc/acpi/ video/GFX0$ cat DD0[1-5]/brightness
<not supported>
<not supported>
levels: 10 20 30 40 50 60 70 80 90 100
current: 60
<not supported>
<not supported>
So, DD01, DD02, DD04 and DD05 claim not to support backlight, but DD03 does.
*) The brightness DOES change, when trying to reduce brightness when /proc/acpi/ video/GFX03/ brightness is already at minimum (10), or when trying to increase brightness when the bar it's at maximum (100). Then brightness changes to dim or bright. Is that really minimum and maximum brightness, I really can't tell...