linux-kernel - Re: [PATCH v2 2/2] drm/amdgpu: implement page_flip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aYplYyf6Pp20lOAD@hal-station>
Date: Mon, 9 Feb 2026 17:53:23 -0500
From: Hamza Mahfooz <someguy@...ective-light.com>
To: Christian König <christian.koenig@....com>
Cc: dri-devel@...ts.freedesktop.org,
	Timur Kristóf <timur.kristof@...il.com>,
	Michel Dänzer <michel.daenzer@...lbox.org>,
	Xaver Hugl <xaver.hugl@....org>,
	Harry Wentland <harry.wentland@....com>,
	Leo Li <sunpeng.li@....com>, Rodrigo Siqueira <siqueira@...lia.com>,
	Alex Deucher <alexander.deucher@....com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Kenneth Feng <kenneth.feng@....com>,
	Ivan Lipski <ivan.lipski@....com>, Alex Hung <alex.hung@....com>,
	Tom Chung <chiahsuan.chung@....com>, Melissa Wen <mwen@...lia.com>,
	Michel Dänzer <mdaenzer@...hat.com>,
	Fangzhi Zuo <Jerry.Zuo@....com>, amd-gfx@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] drm/amdgpu: implement page_flip_timeout() supporty

On Mon, Feb 09, 2026 at 10:36:23AM +0100, Christian König wrote:
> Well that might work but is even worse than a GPU reset.
> 
> Have you tried to just signal the page flip as done?
> 

I have tried that actually and it didn't work in my case (outside of
your contrived scenario [1], though forcing a full modeset should take
care of that case regardless).

Though, I strongly suspect a firmware hang with the issue that I'm
seeing since I get DMCUB errors before the timeout. i.e.:

amdgpu 0000:06:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
[...]
amdgpu 0000:06:00.0: [drm] *ERROR* [CRTC:364:crtc-0] flip_done timed out


[1] https://lore.kernel.org/r/30f2480d-016f-417e-9ddf-7805e4943e7b@amd.com/