Ubuntu NX client / server resolution doesn’t match

[roland]

I have an Ubuntu 18.04 client and connect to a 18.04 remote KVM machine (virtual display) using the free NX version.  I have the setting set to match the display resolution of the client, which is my second monitor @ 2560 x 1440.  However, when the connection is made the remote resolution changes automatically to 2048 x 1152, which of course makes the experience grainy/fuzzy.

I have set the resolution to  custom as shown below, but it doesn’t change things.

 

 

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[roland]

Ok, I resolved the issue.  When I checked the console on the VM, Ubuntu 18.04 did not have a 2560×1440 resolution to select.  So I followed bonus bits website /wiki/HowTo:Add_Missing_or_Custom_Display_Resolution_on_Ubuntu and added it as follows.  Now NX works fine @ 1560×1440.

~$ sudo cvt 2560 1440 60
# 2560×1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
Modeline “2560x1440_60.00”  312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
~$ sudo xrandr –newmode “2560x1440_60.00”  312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
~$ sudo xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
Virtual-1 connected primary 1920×1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024×768      59.95 +  60.00
4096×2160     60.00    59.94
2560×1600     59.99    59.97
1920×1440     60.00
1856×1392     60.00
1792×1344     60.00
2048×1152     60.00
1920×1200     59.88    59.95
1920×1080     60.00*
1600×1200     60.00
1680×1050     59.95    59.88
1400×1050     59.98    59.95
1600×900      60.00
1280×1024     60.02
1440×900      59.89    59.90
1280×960      60.00
1366×768      59.79    60.00
1360×768      60.02
1280×800      59.81    59.91
1280×768      59.87    59.99
1280×720      60.00
800×600       60.32    56.25
848×480       60.00
640×480       59.94
2560x1440_60.00 (0x2d9) 312.250MHz -HSync +VSync
h: width  2560 start 2752 end 3024 total 3488 skew    0 clock  89.52KHz
v: height 1440 start 1443 end 1448 total 1493           clock  59.96Hz
~$ sudo xrandr –addmode Virtual-1 2560x1440_60.00

[Britgirl]

Thanks for letting us know. I’ll close this thread.

[Author]

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