Ubuntu
xserver-xorg-video-ati package

  1. Bug #175243
  2. Comment #11

Comment 11 for bug 175243

Revision history for this message
Misha Koshelev (misha680) wrote : Re: screen flickers only if text tty entered (radeon)

Interesting fix I discovered quite serendipitously. Probably ends up resetting whatever register is not reset otherwise:

xrandr --addmode S-video 800x600
xrandr --output S-video --mode 800x600

_immediately_ fixes the X flicker (but not the one in the VT if you switch to a VT) even with nothing hooked
up to S-video. I will see if I can narrow down any easier xrandr fixes/workarounds for this bug.

Misha