Description of problem: Dual-monitor support on Gnome 3.x seems broken. Version-Release number of selected component (if applicable): Fedora 17, Gnome 3.4 How reproducible: Always. Alternative 1: ============== Steps to Reproduce: 1. Connect a second monitor to laptop 2. Power on / boot 3. Try to login to gnome shell Actual results: Gnome starts in fallback mode Expected results: Gnome shell instead of fallback mode Alternative 2: ============== Steps to Reproduce: 1. Login to gnome shell 2. Connect second monitor 3. Disable mirroring for the second monitor Actual results: The desktop background is always blue Expected results: The wallpaper picture or configured background color should be shown. Additional info: I tried two different laptops and different monitors with different native resolutions. The first laptop has "Gallium 0.4 on ATI RS690" graphics and the other "Intel 945GME".
Created attachment 614117 [details] ~/.xsession-errors
Created attachment 614119 [details] dmesg
Created attachment 614121 [details] Xorg.0.log
As it turns out this seems to be related to a hardware limit. Trying the same with an ubuntu live system I get the message that the combined resolution may not exceed 2048x2048 for 3d acceleration to work. Gnome shell doesn't start without hardware acceleration. Even with the built-in laptop display switched off it doesn't start. Though the hardware limit wouldn't be reached. Plugging in the second monitor after gnome shell has started brings the desktop background back if the built-in display is off. Therefore I'm not sure if this is really a gnome bug. It seems that with both displays activated gnome shell falls back to software rendering, which has it's very own issues.
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Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.