Bug#467105: ATI driver: use of Xv causes one monitor to be repeatedly blanked

[Darren Salt]

I demand that Brice Goglin may or may not have written...

> Darren Salt wrote:
>> One of my monitors (VGA-0) is repeatedly and regularly blanked and
>> unblanked, each change being approx. 1s apart when Xv is in use, e.g. by
>> gxine.

Actually, more like 1s off, 3s on, and for each pair of state changes, there
is a corresponding pair of
  enable montype: 1
  enable montype: 3
in the log.

>> The other monitor (DVI-0) is unaffected, and the position of the
>> overlay does not appear to make any difference, though it does need to be
>> visible (tested by shading and unshading the video window).

>> Reverting to 1:6.7.197-1 cured the problem. I have not checked
>> intermediate snapshot builds.

> Please try at least these intermediate snapshot. There are 6 of them
> available at http://snapshot.debian.net

> Or better, do a git-bisect in the upstream git repository
> http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-ati.git to locate
> the exact commit breaking this. If you need help, please let me know.

9ab5d2ec7c583c74f364d7cfbb54bcd2cd8ae2f5 is first bad commit
commit 9ab5d2ec7c583c74f364d7cfbb54bcd2cd8ae2f5
Author: Alex Deucher <alex at botch2.(none)>
Date:   Mon Feb 11 15:26:51 2008 -0500

    RADEON: always restore crtc1 before crtc0 when using both crtcs

    In some rare cases restoring crtc0 first will result in a blank screen
    on crtc1.  If you are having issues with a blank screen on crtc1
    that used to work on 6.6.3 or before, this should help.

6.8.0 with this reverted is fine.

-- 
| Darren Salt    | linux or ds at              | nr. Ashington, | Toon
| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
| + Travel less. Share transport more.           PRODUCE LESS CARBON DIOXIDE.

You can't get to Heaven on roller skates.