Re: [PATCH 0/3] Fixes for hybrid sleep

[Kenneth Crudup <kenny@panix.com>]

(Thanks Mario for the hint re: replying via Lore!)

On 9/24/25 13:52, Mario Limonciello (AMD) wrote:
> Ionut Nechita reported recently a hibernate failure, but in debugging
> the issue it's actually not a hibernate failure; but a hybrid sleep
> failure.
> 
> Multiple changes related to the change of when swap is disabled in
> the suspend sequence contribute to the failure.  See the individual
> patches for details.
> 
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/4573

I just wanted to say that the non-AMD-display bits of this patch were 
tested by me and seem to have fixed a problem I'd had where if I had an 
NFS share mounted on suspend/hibernate, that ~50% of the time when 
resuming the machine would be up, but disk I/O would be deadlocked (so I 
really couldn't do anything except SysRq-S/U/B).

Still going to test a few more suspend/resume/hibernate cycles, but it 
does seem to have fixed that issue for me. There was a corresponding 
patch in linux-pm earlier along the same lines, but that one only had a 
limited success rate.

I have "hybrid sleep" enabled, where systemd will go into full 
hibernation after 4 hrs, BTW.

>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  2 +-
>   include/linux/suspend.h                 |  2 ++
>   kernel/power/hibernate.c                | 13 ++++++++++++-
>   3 files changed, 15 insertions(+), 2 deletions(-)
> 

Tested-By: Kenneth Crudup <kenny@panix.com>

-Kenny

-- 
Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange 
County CA