[Bug 201585] New: 144Hz 2560x1440 no longer works (caps at 120Hz)

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https://bugzilla.kernel.org/show_bug.cgi?id=201585

            Bug ID: 201585
           Summary: 144Hz 2560x1440 no longer works (caps at 120Hz)
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.18
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx
          Reporter: dan@xxxxxxxxxxxxxx
        Regression: No

> Using the default driver on Ubuntu 18.10 starting from the 4.18 kernel and
> up, results in the maximum frame rate being limited to 120Hz at 2560x1440.
> Downgrading to 4.17.19 increases it back to 144Hz.


sudo lshw -c video,
  *-display                 
       description: VGA compatible controller
       product: Vega 10 XT [Radeon RX Vega 64]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:28:00.0
       version: c1
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=amdgpu latency=0
       resources: irq:70 memory:e0000000-efffffff memory:f0000000-f01fffff
ioport:e000(size=256) memory:fe600000-fe67ffff memory:fe680000-fe69ffff

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