Description of problem: Wehn I connect an external monitor to my laptop with a MiniDipsplayPort adapter, it doesn't show all the available resolutions. The monitor supports 1920x1080 while xrandr reports up to 1024x768. Version-Release number of selected component (if applicable): intel driver ------------ xorg-x11-drv-intel Version : 2.21.8 Release : 1.fc18 How reproducible: Connect external screen to laptop with MiniDiplayPort adapter Steps to Reproduce: 1. connect screen 2. try to set the resolution Actual results: Not all supported reolutions are shown Expected results: All supported resolutions should be available. Additional info: Laptop type : Dell XPS13 (sputnik project with Ubuntu) xrandr output ------------- → xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 294mm x 165mm 1920x1080 60.0*+ 40.0 1400x1050 60.0 1280x1024 60.0 1280x960 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9 Dmesg shows this : [ 642.088252] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
Some additional info: When I initially installed F18, the screen could be used with the correct resolution. current kernel : 3.9.6-200.fc18.x86_64 Output of monitor-edid EISA ID: CMN1345 EDID version: 1.4 EDID extension blocks: 0 Screen size: 29.4 cm x 16.5 cm (13.27 inches, aspect ratio 16/9 = 1.78) Gamma: 2.2 Digital signal # Monitor preferred modeline (60.0 Hz vsync, 66.7 kHz hsync, ratio 16/9, 165 dpi) ModeLine "1920x1080" 138.78 1920 1966 1996 2080 1080 1082 1086 1112 -hsync +vsync # Monitor supported modeline (40.0 Hz vsync, 44.5 kHz hsync, ratio 16/9, 165 dpi) ModeLine "1920x1080" 92.52 1920 1966 1996 2080 1080 1082 1086 1112 -hsync +vsync
Hi, I gave this another go since running Ubuntu is not really my thing. When I run this I can get the ecternal screen screen to work with the correct resolution Fedora20 Aplpha [root@localhost ~]# xrandr --newmode 1920x1080_ 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync [root@localhost ~]# xrandr --addmode DP1 1920x1080_ [root@localhost ~]# xrandr --output DP1 --mode 1920_1080_
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