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[mt1086 <torresmat@xxxxxxxxx>]

I have the same problem since I installed Ubuntu 11.04. Almost every
time I open the lid of my laptop (computer on, not suspended) the screen
freezes. I can tell the processes are still alive but nothing moves in
the screen (except the mouse). Usually I switch to a terminal (Ctrl +
F1) and restart gdm.

If I switch to the terminal and then go back to the graphic interface,
without restarting GDM, this message appears in the kern.log:

  Aug  5 20:45:08 jimi kernel: [  465.420906] [drm:drm_mode_getfb]
*ERROR* invalid framebuffer id

And if I do that two more times...

  Aug  5 20:45:36 jimi kernel: [  492.996705] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
  Aug  5 20:45:51 jimi kernel: [  508.597962] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id

Sometimes I get a "Restoring backlight" message just before the "invalid
framebuffer" error:

  Aug  1 12:59:06 jimi kernel: [13607.373647] video LNXVIDEO:01: Restoring backlight state
  Aug  1 12:59:06 jimi kernel: [13607.382141] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id

=== System Description ===

* Running Ubuntu Natty 11.04, built for amd64.

* uname -a : 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC
2011 x86_64 x86_64 x86_64 GNU/Linux"

* Laptop Dell Vostro 1510


** Attachment added: "bugReport.tar"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/780923/+attachment/2257174/+files/bugReport.tar

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https://bugs.launchpad.net/bugs/780923

Title:
  After upgrading 10.10 to 11.04 resume from hibernate somehow breaks
  the graphics [[drm:drm_mode_getfb] *ERROR* invalid framebuffer id]

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