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

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

[bugzilla-daemon]

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@kernel-bugs.osdl.org
          Reporter: dan@acristinii.com
        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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[Bug 201585] 144Hz 2560x1440 no longer works (caps at 120Hz)

[bugzilla-daemon]

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

Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nicholas.kazlauskas@amd.com

--- Comment #1 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
Please attach a full dmesg log as well as an xorg log if applicable.

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

[bugzilla-daemon]

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

--- Comment #2 from Dan Acristinii (dan@acristinii.com) ---
for which kernel version, 4.18 or 4.19?

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

[bugzilla-daemon]

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

--- Comment #3 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
The kernel you're experiencing the issue on, 4.18.

It might be worth trying 4.19 to see if you can still reproduce the issue
there, however.

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

[bugzilla-daemon]

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

--- Comment #4 from Dan Acristinii (dan@acristinii.com) ---
Created attachment 279285
  --> https://bugzilla.kernel.org/attachment.cgi?id=279285&action=edit
dmesg.log on 4.18

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

[bugzilla-daemon]

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

--- Comment #5 from Dan Acristinii (dan@acristinii.com) ---
The issue persists on 4.19

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

[bugzilla-daemon]

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

--- Comment #6 from Dan Acristinii (dan@acristinii.com) ---
Created attachment 279287
  --> https://bugzilla.kernel.org/attachment.cgi?id=279287&action=edit
144Hz working dmesg on 4.17.19

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

[bugzilla-daemon]

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

--- Comment #7 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
It may also help to have a dmesg log for 4.18 with drm.debug=4 as part of your
bootline.

Thanks for all the logs.

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

[bugzilla-daemon]

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

--- Comment #8 from Dan Acristinii (dan@acristinii.com) ---
Created attachment 279289
  --> https://bugzilla.kernel.org/attachment.cgi?id=279289&action=edit
4.18 with drm.debug=4

I think I added it in the right way

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

[bugzilla-daemon]

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

--- Comment #9 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
These patches should fix your issue:

https://patchwork.freedesktop.org/series/52164/

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

[bugzilla-daemon]

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

--- Comment #10 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
(In reply to Nicholas Kazlauskas from comment #9)
> These patches should fix your issue:
> 
> https://patchwork.freedesktop.org/series/52164/

I suppose I should mention that these are for amd-staging-drm-next, they
probably won't cleanly apply on Linus' tree.

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

[bugzilla-daemon]

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

--- Comment #11 from Dan Acristinii (dan@acristinii.com) ---
Created attachment 279377
  --> https://bugzilla.kernel.org/attachment.cgi?id=279377&action=edit
applied patch to amd-staging-drm-next

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

[bugzilla-daemon]

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

--- Comment #12 from Dan Acristinii (dan@acristinii.com) ---
(In reply to Nicholas Kazlauskas from comment #10)
> (In reply to Nicholas Kazlauskas from comment #9)
> > These patches should fix your issue:
> > 
> > https://patchwork.freedesktop.org/series/52164/
> 
> I suppose I should mention that these are for amd-staging-drm-next, they
> probably won't cleanly apply on Linus' tree.

I would like to mention that revision 2 of the patch is incompatible with
amd-staging-drm-next

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

[bugzilla-daemon]

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

--- Comment #13 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) ---
(In reply to Dan Acristinii from comment #12)
> (In reply to Nicholas Kazlauskas from comment #10)
> > (In reply to Nicholas Kazlauskas from comment #9)
> > > These patches should fix your issue:
> > > 
> > > https://patchwork.freedesktop.org/series/52164/
> > 
> > I suppose I should mention that these are for amd-staging-drm-next, they
> > probably won't cleanly apply on Linus' tree.
> 
> I would like to mention that revision 2 of the patch is incompatible with
> amd-staging-drm-next

Are you on the amd-staging-drm-next branch? ie.

git checkout --track origin/amd-staging-drm-next

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

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

--- Comment #14 from Alexander Walker (alex@alexwalker.info) ---
Also experiencing this on AMD Vega 56 on 4.20.

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