Created attachment 77747 Glitchy Output
If I attach an external monitor to my Lenovo Thinkpad T420 and type the following command: xrandr --output VGA1 --auto --primary --output LVDS1 --off I get glitchy output as shown in the attached picture.
I have tested with a pre-built Ubuntu kernel here: http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/current/ This should be commit bae3699182027525d92b97d904578a533264b242 from the drm-intel tree next branch.
The related launchpad bug is here: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1157678
While https://bugs.freedesktop.org/show_bug.cgi?id=57160 is linked in the bug, I believe this is another issue. I've tested with a kernel that contains the patch and it did not fix the issue.
My graphics card is: 2nd Generation Core Processor Family Integrated Graphics Controller [8086:116]
Created attachment 77747
Glitchy Output
If I attach an external monitor to my Lenovo Thinkpad T420 and type the following command:
xrandr --output VGA1 --auto --primary --output LVDS1 --off
I get glitchy output as shown in the attached picture.
I have tested with a pre-built Ubuntu kernel here: kernel. ubuntu. com/~kernel- ppa/mainline/ drm-intel- next/current/ 5d92b97d904578a 533264b242 from the drm-intel tree next branch.
http://
This should be commit bae369918202752
The related launchpad bug is here: /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/1157678
https:/
While https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 57160 is linked in the bug, I believe this is another issue. I've tested with a kernel that contains the patch and it did not fix the issue.
My graphics card is:
2nd Generation Core Processor Family Integrated Graphics Controller [8086:116]