2560x1440 60Hz doesn’t work over HDMI (Geforce GT 620).
Hi.
I just got a new Dell monitor (U2715H), and even with beta Nvidia driver (355.06) on Debian testing x86_64, it doesn’t detect highest resolution (2560x1440) when connected over HDMI to Geforce GT 620. I got an HDMI 2.0 compliant cable, and according to Dell reps, the monitor should support 2560x1440 over HDMI. Is it a driver issue and is there any way to work around that? See attached nvidia-bug-report.sh log.
Some suggested using xrandr to set the video mode explicitly. I tried doing it, and first got a EDID file with nvidia-settings, and run edid-decode. Where is what I got there:
Detailed mode: Clock 241.500 MHz, 597 mm x 336 mm
2560 2608 2640 2720 hborder 0
1440 1443 1448 1481 vborder 0
+hsync -vsync
So I used those values to make a new mode in xrandr:
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: 31
Current serial number in output stream: 32