https://bugs.kde.org/show_bug.cgi?id=500433
--- Comment #16 from Tom Dzmelyk <tddzm...@mtu.edu> ---
Also reproduces on kernel 6.14

Went compiled old versions to check, was introduced in 6.3.1 and was not
present in 6.3.0. Used v6.3.0 and v6.3.1 as good/bad and bisected to

5453662f9cd4816e4b046beb0c7df5a676a3df7c is the first bad commit
commit 5453662f9cd4816e4b046beb0c7df5a676a3df7c
Author: Xaver Hugl <xaver.h...@gmail.com>
Date:   Fri Feb 14 16:43:36 2025 +0100

    backends/drm: fix KMS offloading with scaling

    We apply scaling in most cases to normalize values to [0; 1], so the check
for
    input values > 1 was often wrongly preventing KMS offloading.

    (cherry picked from commit 4205a9b9423d08678483b5c6fa7da2dc5ed29628)

Also on closer inspection it's not strictly a bright flicker, it's dark flicker
as well. 

The frame on entering scanout is too bright, in addition to the frame on
exiting scanout being too dark.

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