Display is a Crossover 2720MDP (cheap South Korean QHD screen). I don't think this ever worked right with nouveau since when I bought it in March 2013. The correct full resolution is not available in Ubuntu's System Settings section 'Displays'. It works fine with the nvidia driver (and under Windows). $ lspci | grep VGA 01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev a2) Will attach logs later on.
Created attachment 123594 [details] Crossover 2720MPD EDID dump
Created attachment 123595 [details] Log from EDID dumper get-edid
Created attachment 123596 [details] Kernel log buffer from `dmesg`
Created attachment 123597 [details] stdout from parse-edid
Created attachment 123598 [details] Errors from parse-edid
Created attachment 123599 [details] stdout from edid-decode
Created attachment 123600 [details] Xorg.0.log from system running nouveau
Not too relevant, since it's not in the EDID, but the name of the screen is Crossover 2720MDP as originally mentioned (made a typo in the upload description).
Graphics card is the Palit GeForce GTX 750 Ti KalmX (a fanless card). Using the Mini-HDMI port, and an HDMI connector on the screen side.
Created attachment 123602 [details] `ddcprobe` output
Created attachment 123603 [details] `xrandr --props` output
Hi, This is likely caused by the hdmi clock restrictions in the nouveau kernel driver, which are fixed by this commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1a0c96c075bb4517d4ce4fb6750ee0a3cf38714c Which is available in the 4.5 (and later) kernels, can you please upgrade your kernel to 4.5 and try again? Regards, Hans
Nice if your bugs are fixed in advance ;) Performance is more sluggish than the proprietary driver. But it picks the native resolution using Linux v4.5.1. Much better.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.