[Bug 415822] [NEW] [i945GM][xorg-edgers][2.6.31-020631rc6-generic] Unable to set virtual size greater than 2048x2048

[Hans Jørgen Hoel]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

Dell Latitude D820 in docking station with one DVI and one VGA monitor
connected.

Before I upgraded to Jaunty from Gutsy, setting virtual to greater than
2048x2048 would automatically disable DRI.

After upgrading to Jaunty, performance both with and without DRI was
terrible. Tried xorg-edgers PPA and unofficial mainline kernel which
fixed performance issues.

With xorg-edgers PPA and the unofficial mainline kernel (v2.6.30.3), and
virtual set greater than 2048x2048, xorg would exit when started, saying
that DRI could not be enabled.

Upgraded to the v2.6.31-rc6 kernel. According to
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.31-rc6/CHANGES it
contains the fix "drm/i915: Allow frame buffers up to 4096x4096 on
915/945 class hardware". With this kernel, xorg starts when virtual is
set greater than 2048x2048, but second screen is not enabled.

Running xrandr (with virtual set to either 3360x1050 or 4096x4096 in
xorg.conf):

xrandr --output LVDS --off   # must be done separately
xrandr --output TMDS-1 --mode 1680x1050 --output VGA --mode 1680x1050 --right-of TMDS-1
xrandr: screen cannot be larger than 2048x2048 (desired size 3360x1050)

xrandr --fb 3360x1050 --output TMDS-1 --mode 1680x1050 --output VGA --mode 1680x1050 --right-of TMDS-1
xrandr: screen cannot be larger than 2048x2048 (desired size 3360x1050)

I'm also explicitly disabling DRI and DRI2 in xorg.conf.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: xserver-xorg-video-intel 2:2.8.0+git20090814.926c7e7d-0ubuntu0sarvatt~jaunty
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersion: Linux version 2.6.31-020631rc6-generic (root at zinc) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)) #020631rc6 SMP Fri Aug 14 09:43:40 UTC 2009
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-020631rc6-generic i686
UnreportableReason: This is not a genuine Ubuntu package

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 945gm apport-bug dual-head i386

-- 
[i945GM][xorg-edgers][2.6.31-020631rc6-generic] Unable to set virtual size greater than 2048x2048
https://bugs.launchpad.net/bugs/415822
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