[Bug 327107] Re: [i855] [jaunty] external monitor makes X fail

[Geir Ove Myhr]

** Summary changed:

- [jaunty] external monitor makes X fail
+ [i855] [jaunty] external monitor makes X fail

** Description changed:

  Binary package hint: xserver-xorg-video-intel
  
  I have an IBM x40 laptop and ran into this problem when attaching an
  external screen with the resolution of 1920x1200 (LG 24") the normal
  resolution of the LVDS is 1024x768.
  
  If I booted the machine without the external screen I could login and
  use the Compiz no problem. If I attached an external screen while in
  Gnome the resolution manager wouldn't find the new screen. So I log out
  while the external screen is attached and the screen would flicker a few
  times and start in fail safe mode. If I detached the external screen and
  restart GDM... I'm back in a working system but can't use my external
  screen.
  
  If I had the external monitor detached but set the Virtual resolution to 1920x1200 instead - it would still trigger the error.
  This might be a way to reproduce without having an external monitor.
  
  My error message is slightly different than in bug #304871 (notice BACK
  buffer), but still might be a dupe?:
  
  [1 sec: 398636 usec](EE) intel(0): Failed to pin back buffer: Cannot allocate memory
  [1 sec: 398707 usec]
  Fatal server error:
  [1 sec: 398723 usec]Couldn't bind memory for BO back buffer
  
  
  But using the same workaround as in bug #304871 works:
  
      Setting 'Option "DRI" "false"
  
  Now I can use my external screen in 1920x1600 but without Compiz.
  With DRI enabled I was able to go as high as 1680x1050 using Virtual. It gave weird graphic errors though so I gave it up.
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller [8086:3580] (rev 02)
+ 	Subsystem: IBM Device [1014:055c]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02)
+ 	Subsystem: IBM Device [1014:0557]

** Tags added: 855gm dri external intel jaunty xorg

-- 
[i855] [jaunty] external monitor makes X fail
https://bugs.launchpad.net/bugs/327107
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs at lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs