I am trying to add a new resolution to my machine, which I have hooked up to the TV. I want 2K (1440p) output so I can use it to stream my games from my main PC so I don't have to move it. I am running a Nvidia GTX 550 Ti (I know ancient card but I had it lying around) and have the Nvidia 390 driver installed. I am using the dual-link DVI port which according to Nvidia should support 1440p:
Dual-link DVI Support: Able to drive industry’s largest and highest resolution flat-panel displays up to 2560x1600 and with support for High-bandwidth Digital Content Protection (HDCP)
However everytime I use xrandr to set up the resolution using these commands:
cvt 2560 1440 60
xrandr --newmode "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
xrandr --addmode DVI-I-1 "2560x1440_60.00"
I get this error:
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
I have already tried changing the HorizSync and VertRefresh in the /etc/X11/xorg.conf to the values my TV gives by parsing the edid information, however that did not work either. I have also tried getting the modeline from the edid information but did not work either. I have also tried running "cvt 2560 1440 60 -r" but no luck there either.
Is there anything else I could try?
