My monitor supports 1920×1080 @ 60hz (LG W2486L) and graphic card (GeForce 9400 GT)
using Ubuntu 12.04.
When I type xrandr -q
I get this:
xrandr -q xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 50.0* 1920x1080_59.90 59.9 1920x1080_60.00 60.0
Right now the refresh rate is on 50 and hurt my eyes real bad.
So I'm trying to change it to 60hz:
xrandr --output default --mode 1920x1080_60.00
xrandr: Failed to get size of gamma for output default
What I can do? I tried
gtf 1920 1080 60.0 # 1920x1080 @ 60.00 Hz (GTF) hsync: 67.08 kHz; pclk: 172.80 MHz Modeline "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync xrandr --newmode "1920x1080_60.00" 172.51 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync xrandr: Failed to get size of gamma for output default X Error of failed request: BadName (named color or font does not exist) Major opcode of failed request: 153 (RANDR) Minor opcode of failed request: 16 (RRCreateMode) Serial number of failed request: 19 Current serial number in output stream: 19 xrandr --output default --mode 1920x1080_60.00 xrandr: Failed to get size of gamma for output default
Someone have the solution for this? I can't work on the PC like that, 50Hz is very low and can't look at the screen more than 5 mins.
Thank you!
Best Answer
Your xrandr -q output shows that you have 1920x1080_59.90 resolution available
You can use this to set the new resolution
Also, if you are creating newmode using
You also need to add this mode using
And then set the new resolution using