Re: X11 system lockup with 5.11.0 kernel

On Thu, Jun 03, 2021 at 03:15:05PM +0200, Maciej W. Rozycki wrote:
>  I have lost track about this issue, so please fill me in as to whether 
> the offending commit causing the regression has been bisected or not.

It has.  Michael Cree reported the following back on April 5th:

And the first bad commit is:

0fe3cf3a53b5c1205ec7d321be1185b075dff205 is the first bad commit
commit 0fe3cf3a53b5c1205ec7d321be1185b075dff205
Author: Christian König <[email protected]>
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 <[email protected]>
    Reviewed-by: Dave Airlie <[email protected]>
    Reviewed-by: Madhav Chauhan <[email protected]>
    Tested-by: Huang Rui <[email protected]>
    Link: https://patchwork.freedesktop.org/patch/397088/?series=83051&rev=1

:040000 040000 4e643ef861b921392bc67be21a42298c91c7ff7a b36453567c3176a3cd50fa0b23886b0fd642560d M	drivers

--Bob