Bug#448755: xserver-xorg: one display keeps turning off in xinerama (3-display) mode
Pallinger Péter wrote:
> Package: xserver-xorg
> Version: 1:7.1.0-19
> Severity: normal
>
> I have a three-monitor setup with the following components:
> - ATI Radeon 7000 PCI
> - integrated Intel 845 chip
> - one 19" TFT @ 1240x1024
> - two 15" TFTs @ 1024x768
> - lspci|grep VGA output:
> 00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)
> 01:02.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
>
> The 19" TFT is connected to the DVI port of the radeon card, the other two
> are connected to the remaining DSUB connectors. The 19" TFT is on the left,
> the wto others are on its right, above each other.
>
> The 19" TFT keeps turning off sporadically (each 2-10 minutes) for about 2
> seconds. The effect is the same as if the monitor changed video modes; but
> it does not (or to the same mode). The effect is produced in any video mode
> I have tried.
>
> In very rare cases (at most once a day), the display becomes distorted until
> the next 'switchoff' or manual resolution change, the whole screen being
> horizontally compressed into the right 4/5s of the screen.
>
> The other two displays work without any problem.
>
> Switching between applications on different monitors makes the effect appear
> more often (but sometimes it does not).
>
> I am using gnome, with automatic power management and screensaver turned off.
>
> A similar error is described in the mandrake/mandriva bugzilla, but I could
> not find an equivalent report for debian.
> http://qa.mandrivalinux.com/show_bug.cgi?id=6745
>
You seem to be using a very old Xorg (from Debian Etch). Things evolved
a lot
since then. So I should say "can you upgrade to testing or unstable?".
Unfortunately, multiple board support is broken in unstable and won't be
fixed
very soon.
Still, one thing you could try is disabling the i810 config in your
xorg.conf and
see if the problem remains when only the 2 outputs of the radeon are
used. If it
doesn't help, the problem will likely be in the ati driver (which is
getting very
active development these days).
Brice
Reply to: