Currently, I am using Ubuntu 20.04.1 LTS and problem with the external screen (I'm using HDMI to connect).
My additional screen supports 2K resolution, but I am not able to use it. I don't have this option in the dropdown list. The highest resolution that I'm able to choose is 2560 x 1080.
The weirdest thing is that on the same machine I have also Windows 10 on that system, by deafault resolution is 2K.
I was reading many questions here about resolution problem on Ubuntu, but nothing helps me.
The next step is to reinstall the whole system.
I updated Ubuntu from 18 to 20, maybe this is problem, but on 18 it didn't work also.
Can some have any ideas about the solution? I am able to attach all the needed data.
My computer spec:
- Processor -> Intel® Core™ i7-8550U CPU @ 1.80GHz × 8
- Graphics -> Mesa Intel® UHD Graphics 620 (KBL GT2)
- Memory -> 16 GB
Add xrandr:
Screen 0: minimum 320 x 200, current 2560 x 2160, maximum 16384 x 16384
eDP-1 connected 1920x1080+269+1080 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.06*+ 60.01 59.97 59.96 59.93 48.04
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 connected primary 2560x1080+0+0 (normal left inverted right x axis y axis) 698mm x 393mm
2560x1080 30.00* 29.97 24.00 23.98 25.00
2048x1152 60.00
1920x1200 59.95
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1152x864 75.00
1280x720 60.00 50.00 59.94
1440x576 50.00
1024x768 75.03 70.07 60.00
1440x480 60.00 59.94
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
After added new mode with xrandr:
Screen 0: minimum 320 x 200, current 4480 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.06*+ 60.01 59.97 59.96 59.93 48.04
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 connected 2560x1080+1920+0 (normal left inverted right x axis y axis) 698mm x 393mm
2560x1080 30.00* 29.97 24.00 23.98 25.00
2048x1152 60.00
1920x1200 59.95
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1152x864 75.00
1280x720 60.00 50.00 59.94
1440x576 50.00
1024x768 75.03 70.07 60.00
1440x480 60.00 59.94
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
2560x1440_60.00 59.96
EDIT
Maybe this will be game-changer but I was able to set up 2560×1440 using
cvt 2560 1440 30
Best Answer
To get access to a given mode, you typically need the following sequence of commands:
cvt <width-pixels> <height-pixels>You would needcvt 2560 1440.Note: this post from a thread linked below suggests one may have to tinker a little with parameters, different from what is returned by the "bare"
cvtcommand posted above. If you found one set that works, you may start tinkering to adjust for the best performance. I have little experience on that.Copy the second line of output, except for the leading
Modeline, in the commandxrandr --newmode <copied parameters>, to create the new mode.Add the new mode to those available for your target display
xrandr --addmode HDMI-1 <name of new mode>.You should now see it as an available mode for your display, and select it.
If this works, you could automate the process of adding and selecting the mode. In Best place to automatically add mode in xrandr you will find a description (without
cvt, as I had already done it at that point). As for why the mode is not automatically detected, I wouldn't know, but it would be more of a curiosity I guess.You could post feedback/what you get by updating your question.
EDIT: Try connecting via DVI instead of HDMI.
Possibly related:
https://ubuntuforums.org/showthread.php?t=2399525
https://www.linuxquestions.org/questions/linux-hardware-18/how-to-increase-display-resolution-to-2560x1440-4175623279/