[i965] External monitor detection broken when using KMS on Intel GM965
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
High
|
Unassigned | ||
Karmic |
Fix Released
|
High
|
Unassigned |
Bug Description
Since kernel version 2.6.30-9.10 the external monitor doesn't get properly detected when it was disconnected before disabling it before, when using KMS.
2.6.30-8.9 was the last version where it worked properly.
intel driver version:
- 2.7.99.
- 2.7.99.
Steps to reproduce the bug:
1. screen is on LVDS of the notebook
2. connect external VGA
3. activate external monitor: xrandr --output VGA1 --auto
4. disconnect external monitor
5. deactivate external monitor: xrandr --output VGA1 --off
6. again connect the VGA plug
=> xrandr --query shows: VGA1 disconnected
after that it is impossible to get the external monitor working.
The only solution is to reboot the system.
affects: | linux (Ubuntu) → xserver-xorg-video-intel (Ubuntu) |
Changed in xserver-xorg-video-intel (Ubuntu Karmic): | |
status: | Confirmed → Triaged |
tags: | added: karmic |
summary: |
- External monitor detection broken when using KMS on Intel GM965 + [i965] External monitor detection broken when using KMS on Intel GM965 |
Same issue with: image-2. 6.30-020630- generic 2.6.30-020630 xorg-video- intel 2:2.7.99. 901+git20090701 .1e4784bf- 0ubuntu0sarvatt ~jaunty
-Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c)
-linux-
-xserver-
-KMS on
One additional note: when you turn the VGA off and then disconnect it, xrandr will still report it as "connected"! It will become disconnected once you try to set it but the monitor is not connected. After becoming disconnected, it will never go back to connected.