I have updated my 12.04 HTPC to 14.04 (new install; same hardware), and have started getting awful screen tearing where I had none before.
/proc/cpuinfo
AMD A4-3300 APU with Radeon(tm) HD Graphics
lspci
…
01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)
…
lsmod
…
nvidia 10675249 71
drm 302631 2 nvidia
…
Everything is from the official repos.
xbmc_12.3+dfsg1-3ubuntu1_all.deb
nvidia-331_331.38-0ubuntu7_amd64.deb
Best Answer
I too had this problem after upgrading to 14.04
The solution mentioned here worked wonders for me,
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1278012/comments/12
A workaround for ubuntu 14.04 with nvidia driver is to disable backing store in xorg: Make sure you have the "-bs" option in lightdm config file:
If you're using another mechanism for starting X you can use the same flag in a similar way. For example, here's
startx
which is popularly used in XBMC (and other kiosk applications') startup scripts: