My display is a DELL U2515H
. I have a nVidia GF550Ti
GPU, and both should support the native resolution of 2560 x 1440
over HDMI. But highest resolution ubuntu detected automatically is 2048 x 1152
.
Tested solution "A" (unsuccessful):
The command
cvt 2560 1440 40
gives me2560x1440 39.96 Hz (CVT) hsync: 58.98 kHz; pclk: 201.00 MHz Modeline "2560x1440_40.00" 201.00 2560 2720 2984 3408 1440 1443 1448 1476 -hsync +vsync
And
sudo xrandr --newmode "2560x1440_40.00" 201.00 2560 2720 2984 3408 1440 1443 1448 1476 -hsync +vsync
gives nothing back, so I expect it works.Finally,
sudo xrandr --addmode HDMI-0 2560x1440_40.00
X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 140 (RANDR) Minor opcode of failed request: 18 (RRAddOutputMode) Serial number of failed request: 29 Current serial number in output stream: 30
monitors.xml
file? If yes, please post to paste.ubuntu.comxrandr | grep "connected"