Just installed Ubuntu 15.10, and my second monitor does not use the correct resolution. It defaults to
1024x768, even though it should support
1920x1080. Previously, on Windows this was not a problem. I had this same problem with this monitor on Arch Linux, and was able to correct it like this:
- The EDID had a bad checksum
- Set the
IgnoreEDIDChecksumoption on the Xorg configuration file
/etc/X11/xorg.conf, under the
Option "IgnoreEDIDChecksum" "DFP-4"
I'm not able to find that config option in Ubuntu (and I'm not sure if there is a better way to do it). I've also tried adding a new mode through
xrandr, but would get the following error:
xrandr --addmode DVI-D-0 1920x1080_60.00 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: 41 Current serial number in output stream: 42
Does anybody know how I can correct the problem, or how I can provide more information? I'm using the proprietary NVIDIA driver (the open source driver would just display a black screen on that monitor).