[Bug 81476] three monitors on two radeon cards works with some layouts not others

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jul 18 13:54:21 PDT 2014


--- Comment #9 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #8)
> All along I've been using the vtwm window manager, not the fancy compiz.
> I just tried using twm instead of vtwm; no improvement.
> The desktop doesn't work across two cards with three monitors; the two
> monitors on the first card have video crap on them.   The video crap changes
> a little bit right at the top if I drag windows onto them from the working
> third monitor, but they are otherwise useless (unless I invert them).

To help narrow this down try configuring the displays for a 3x1 configuration
less than 4096 pixels, e.g., 1600x1200+1600x1200+800x600.  If that works then
try bumping the size of the last monitor above the limit. E.g.,

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