On Mon, Apr 05, 2021 at 04:55:15PM +1200, Michael Cree wrote: > On Sun, Apr 04, 2021 at 11:47:58PM -0500, Bob Tracy wrote: > > On Wed, Mar 31, 2021 at 11:04:42AM +0200, Maciej W. Rozycki wrote: > > > I think the only feasible way of determining what has happened here is > > > that you track the offending change down by bisecting the upstream kernel > > > repository with `git bisect'. > > > > That would normally be what I would do, and it may yet happen. Problem > > is, I don't have a 64-bit system with enough disk space to do the kernel > > builds with a cross-compiler, and local (native) builds on the PWS are > > taking 36+ hours each these days. Unless I get *really* lucky with the > > bisects, the task will take a couple of weeks. > > Confirmed that v5.11.0 hard locks up on presenting the X-Desktop > login screen whereas v5.10.0 is fine. This is on a XP1000 with > a Radeon HD4350. And the first bad commit is: 0fe3cf3a53b5c1205ec7d321be1185b075dff205 is the first bad commit commit 0fe3cf3a53b5c1205ec7d321be1185b075dff205 Author: Christian König <christian.koenig@xxxxxxx> Date: Sat Oct 24 13:12:23 2020 +0200 drm/radeon: switch to new allocator v2 It should be able to handle all cases here. v2: fix debugfs as well Signed-off-by: Christian König <christian.koenig@xxxxxxx> Reviewed-by: Dave Airlie <airlied@xxxxxxxxxx> Reviewed-by: Madhav Chauhan <madhav.chauhan@xxxxxxx> Tested-by: Huang Rui <ray.huang@xxxxxxx> Link: https://patchwork.freedesktop.org/patch/397088/?series=83051&rev=1 :040000 040000 4e643ef861b921392bc67be21a42298c91c7ff7a b36453567c3176a3cd50fa0b23886b0fd642560d M drivers Cheers Michael.