[Bug 221714] New: AMDGPU: Firmware issue on Teros TE-2476G monitor causes black screen/instability with FreeSync and invalid EDID.

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221714

            Bug ID: 221714
           Summary: AMDGPU: Firmware issue on Teros TE-2476G monitor
                    causes black screen/instability with FreeSync and
                    invalid EDID.
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: MANCHOIG@gmail.com
        Regression: No

Description:
The Teros TE-2476G monitor (23.8" 144Hz) fails to properly initialize on the
amdgpu driver. The monitor firmware appears to report a null serial number
(00000000) and fails to negotiate high refresh rates (144Hz) when FreeSync is
active. This results in intermittent black screens or a fallback to 60Hz.

System Info:

    GPU: AMD Radeon RX 580

    Driver: amdgpu

    Kernel:  7.1.2-3-cachyos

    Distribution: Arch Linux / CachyOS

Steps to reproduce:

    Connect Teros TE-2476G via DisplayPort.

    Enable default FreeSync/VRR settings.

    System fails to consistently maintain 144Hz link or causes display signal
loss.

Workaround:
The issue is mitigated by disabling FreeSync via kernel parameter
(amdgpu.freesync_video=0) and forcing the monitor mode using
video=DP-1:1920x1080@144 in the bootloader command line.

Expected behavior:
The amdgpu driver should handle the monitor's invalid EDID gracefully or
provide a "quirk" to ignore the missing serial number and allow stable 144Hz
operation without requiring manual cmdline overrides.

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