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 highestresolution flat-panel displays up to 2560x1600 and with supportfor High-bandwidth Digital Content Protection (HDCP)
However everytime I use xrandr to set up the resolution and run the xrandr --addmode command 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: 30I 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.
Is there anything else I could try?