Ubuntu
xserver-xorg-video-intel package

  1. Bug #174650
  2. Comment #2

Comment 2 for bug 174650

Revision history for this message
Bryce Harrington (bryce) wrote : Re: xorg very slow when rotated on external monitor

Hmm, xorg #13044 is against -ati, and includes corruption, not just performance loss, so while it sounds similar to that bug, my guess is that it's unrelated. However, the debugging steps may be useful.

Vu, can you test what happens if you disable DRI? Also, does it make a difference if you rotate the screen in xorg.conf, vs. doing it using the xrandr tool after X has started?

Please also attach your xorg.conf, Xorg.0.log, and lspci -vvnn.