[i965] Wierd backlight brightness behaviour looks like flashes on Amilo Si 2636
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gnome-panel (Ubuntu) |
Invalid
|
Low
|
Ubuntu Desktop Bugs | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
xorg (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
xserver-xorg-video-intel (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
I have random screen flashes in Jaunty beta, where the screen goes black for a split second. Similar flashes appear when I play around with the brightness applet in the gnome-panel.
To reproduce the problem:
1) use your hotkeys to set brightness to min (darkest screen)
2) use your hotkey "brightness up" to go to maximum brightness
3) go further up beyond the max
Result: the screen will go dark again. Going further up with brightness will at some point stabilize the maximum brightness.
Example: my BACKLIGHT levels are 1-2-3-4-5-6-7-0 and if I start from 1 and keep hitting the "brightness up" hotkey then I get the pattern 1-4-5-6-
The interesting thing here is that it dims from 0 to 7 to 2 even though I press "brightness up".
UPDATE: typing "xrandr --output LVDS --set BACKLIGHT_CONTROL combination" into a terminal fixes the problem. Thanks to Aldrin!
[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03)
Subsystem: Fujitsu Siemens Computers Device [1734:111f]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 03)
Subsystem: Fujitsu Siemens Computers Device [1734:111f]
Changed in xserver-xorg-video-intel (Ubuntu): | |
status: | New → Confirmed |
description: | updated |
description: | updated |
description: | updated |
summary: |
- [i965] Jaunty: random screen flashes + [i965] Wierd backlight brightness behaviour looks like flashes on Amilo + Si 2636 |
description: | updated |
description: | updated |
tags: |
added: xorg-needs-kernel-fix removed: xorg |
This is possibly due to some application repeatedly probing the monitor for information. Could you take a look at bug 339200 and bug 344554 and see if you see similarities? Especially, does Xorg.0.log get some lines added to it every time the screen goes black?