[Bug 192921] New: Low frame rates and unrecognized monitor after kernel upgrade

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=192921

            Bug ID: 192921
           Summary: Low frame rates and unrecognized monitor after kernel
                    upgrade
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.10.0
          Hardware: x86-64
                OS: Linux
              Tree: Fedora
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: stevengruspier at gmail.com
        Regression: No

Before upgrading my kernel (4.8.16), there was always a problem where at boot
the refresh rate was too high, so my screen would flicker. I could only set the
refresh rate to 120Hz max without any flickering. This was due to a bug or
feature that had yet to be added to the kernel (was fixed in the DAL patched
unofficial kernel). 

After upgrading the kernel to 4.9.3 I noticed that on boot there was no
flickering at 144Hz anymore, but when trying to play games and videos there are
issues with low frame rates. I then went to the display menu to check settings
and noticed that the monitor now says "unknown". I installed 4.10.0 rc 3 from
the rawhide repo with the same results.

Distro: Fedora 25
GPU: ASUS Strix AMD R9 380 4GB
Monitor: MG278Q (2560 x 1440 @ 144Hz)

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