[07:29] <enyc> unclear-location issue, not sure where to report....
[07:30] <enyc> Ubuntu 20.04 / Mint 20 , doesn't seem to matter which desktop, gives corrupted display on e.g.  ATI RS480  radeon gpu   (something under the hood somewhere...)
[07:31] <enyc> doesn't affect login screen
[07:31] <enyc> works in 18.04 and  Debian-10
[07:31] <enyc> when corrupted present, mouse cursor overlay still works  but everything else unusable...
[07:32] <enyc> Have tried downgrading all the xorg (including -video drivers) packages, old  linux-firmware,  removing mesa accel packages,   no effect
[07:32] <enyc> ...   There semes to be many non-specific reports of ubuntu 20.04 screen corruption bugs  about but unclear
[07:35] <enyc> As such, I don't know where to look to bisect issue   or report bug and so-on
[08:34] <enyc> 09:34 < apw> enyc, the right place for screen corruption is ubuntu-x, they will be able to split kernel/mesa/X
[08:35]  * enyc ROARs =)
[08:52] <tjaalton> probably a kernel regression then
[08:52] <tjaalton> try a newer mainline one
[13:19] <enyc> tjaalton: oooh thankyou for answer
[13:19] <enyc> actually i tried PREVIOUS kernels to no effect (that used to work...)
[13:20] <enyc> 4.10 4.15 etc
[13:20] <enyc> and also in fact, tried a 5.7.0-2  debian kernel pkg too, also same problem
[13:20] <enyc> sorry i missed out that fact
[13:21] <enyc> So, appears problem is not:  kernel, xorg (including drivers), radeon firmware, mesa (if i removed correctly), ...........
[13:24] <tjaalton> dunno then
[13:24] <tjaalton> try #radeon
[21:11] <enyc> tjaalton: did that already ;-(