Description of problem: The latest Rawhide/F21 kernel (actually all of the 3.16 kernels I've tried) fails to properly detect the display resolution of my Samsung monitor. It defaults to 1024x768. Version-Release number of selected component (if applicable): kernel-3.16.0-0.rc4.git1.1.fc21.x86_64 How reproducible: Every time Steps to Reproduce: 1. Install the kernel specified above 2. Plug in a Samsung SyncMaster 2333HD 3. Boot Fedora Actual results: External monitor is stuck in 1024x768 Expected results: Proper resolution (1920x1080) as well as any other supported resolution should be detected. Additional info: I retained the Fedora 20 kernel in GRUB (kernel-3.14.9-200.fc20.x86_64). When I boot with this kernel, the detection happens properly. I am therefore marking this with the Regression keyword. I am using a Lenovo Thinkpad T540p with: 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) Samsung SyncMaster 2333HD I am connecting to the monitor through a docking station. I have tried both the DVI and HDMI inputs of the monitor in case that makes a difference. I have been unable to try a non-docking-station connection as I do not currently have an adapter that will serve. (The laptop has only mini-DisplayPort for outputs and I do not have a mini-DP-to-DVI or mini-DP-to-HDMI cable available).
xrandr output from the kernel-3.16.0-0.rc4.git1.1.fc21.x86_64: Screen 0: minimum 8 x 8, current 2944 x 1080, maximum 32767 x 32767 eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.06*+ 1400x1050 59.98 1280x1024 60.02 1280x960 60.00 1024x768 60.00 800x600 60.32 56.25 640x480 59.94 VGA1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP2 connected 1024x768+1920+0 (normal left inverted right x axis y axis) 520mm x 320mm 1024x768 60.00* 800x600 60.32 56.25 848x480 60.00 640x480 59.94 HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis)
xrandr output from the kernel-3.14.9-200.fc20.x86_64: Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767 eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.06*+ 1400x1050 59.98 1280x1024 60.02 1280x960 60.00 1024x768 60.00 800x600 60.32 56.25 640x480 59.94 VGA1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP2 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 520mm x 320mm 1920x1080 59.93*+ 1600x1200 60.00 1680x1050 59.95 1280x1024 75.02 60.02 1440x900 59.89 1280x960 60.00 1280x800 59.81 1152x864 75.00 1024x768 75.08 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 640x480 75.00 72.81 66.67 60.00 720x400 70.08 HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Not sure exactly when this was fixed, but it's no longer an issue.