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

[Bryce Harrington]

** Description changed:

  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
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
+     	Subsystem: Dell Device [1028:01cc]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
+     	Subsystem: Dell Device [1028:01cc]

-- 
[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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