Description of problem: I have two monitors connected to each DVI output on my 7600 GT. I usually keep one disabled. On startup, GDM displays on both monitors. Once I login, the second monitor displays garbage (or rather a scrambled version of the enabled monitor). Running xrandr shows only one output is enabled: Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 4096 x 4096 DVI-I-1 connected (normal left inverted right x axis y axis) 1280x1024 60.0 1024x768 60.0 800x600 60.3 640x480 60.0 59.9 DVI-I-2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1680x1050 59.9 1680x945 60.0 1400x1050 74.9 59.9 1600x900 60.0 1280x1024 75.0 60.0 1440x900 75.0 59.9 1280x960 60.0 1366x768 60.0 1360x768 60.0 1280x800 74.9 59.9 1152x864 75.0 1280x768 74.9 60.0 1280x720 60.0 1024x768 75.0 70.1 60.0 1024x576 60.0 800x600 72.2 75.0 60.3 56.2 848x480 60.0 640x480 75.0 72.8 60.0 720x400 70.1 TV-1 disconnected (normal left inverted right x axis y axis) I can get it to turn off the output by toggling it on and off in the Gnome control panel. Version-Release number of selected component (if applicable): How reproducible: Everytime Steps to Reproduce: 1. Boot up 2. Login with GDM 3. Monitor on "disabled" output will be scrambled 4. Open "System Settings" -> "Displays". 5. Select disabled disable and turn it on. Press apply. 6. Answer yes to keep configuration. 7. Select the same display. Turn it off. Press apply. 8. Answer yes to keep configuration. The monitor will actually be off now instead of showing scrambled junk. Actual results: Monitor on "disabled" output shows scrambled junk. Expected results: Monitor does not show anything. This is what I see in step 8 above. It should be the same in step 3. Additional info:
Created attachment 605590 [details] Xorg log
How exactly do you "usually keep one disabled" ?
I have it set to off in the "Displays" settings in gnome shell. This setting (just like the screen resolution setting) is persistent across reboots. After I login on, the second monitor starts displaying the scrambled junk even though Xrandr and the "Displays" settings show that the output is disabled.
Okay thanks. I'll try and see if I can reproduce it here and track down what's responsible.
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