https://bugs.freedesktop.org/show_bug.cgi?id=108514
--- Comment #7 from Werner Lueckel werner.lueckel@googlemail.com --- some more tests with different systems give the following table:
sorted by radeon-version system kernel radeon result ------------------------- ----------- -------- -------- UBUNTU 14.04.5 LTS, Trusty Tahr 3.13.0-161 2.36.0 O.K. puppy_tahr 6.0.5 3.14.56 2.37.0 O.K. puppy_slacko 6.3.2 3.14.55 2.37.0 O.K UBCD 3.16.0 2.39.0 FLICKER puppy_xenialpup 7.5 4.4.95 2.43.0 FLICKER UBUNTU 14.04.5 LTS, Trusty Tahr 4.4.0-133 2.43.0 FLICKER UBUNTU 18.04.1 LTS (Bionic Beaver) 4.15.0-36 2.50.0 FLICKER
so the problem seems to start with a radeon.ko driver > 2.37.0; I wonder how the radeon-version 2.38.0 would work, but, so far, I havn't found a system including it.