[06:10] <enyc> AHA $clue from #radeon, ... 
[06:12] <enyc> "old radeons had a pitch limit of 2048 pixels." "the driver tells userspace it's limits, but userspace generally ignores them and tries anyway""
[06:12] <tjaalton> no need to echo here
[06:13] <enyc> SO, this leads to an Ubuntu-X question -- what may have changed, such that ubuntu 18.04 was fine, debian 10 fine,  and 20.04 changes break things,  likely asking driver the impossible now .........?
[06:13] <tjaalton> I just replied there
[06:14] <tjaalton> beyond that, no idea
[06:16] <enyc> hrrm, well xfwm4 could be part of it, the thing is it seems to be all-ofa-suddent broken across all desktops i've tried  
[06:19] <tjaalton> the gpu model is over 15y old, maybe best to get better hw..
[06:19] <tjaalton> or use 18.04 another three years
[06:21] <enyc> tjaalton: indeed my 'main' machines have newer, but that doesn't change something breaking in very un-graceful way
[06:21] <tjaalton> file a bug upstream then
[06:22] <enyc> tjaalton: yes, if only I knew where, which i've not yet tracked down
[06:22] <tjaalton> uh
[06:22] <tjaalton> gitlab.freedesktop.org
[06:22] <enyc> gtk? a window manager?
[06:23] <tjaalton> dri driver for now, they'll close it if it's the wrong place..
[06:26] <enyc> tjaalton: i don't see "dri"
[06:26] <enyc> group "drm" = kernel graphics development
[06:26] <tjaalton> mesa