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Tue, 27 Jan 2026 11:35:12 +0000 Message-ID: <7f049afd-b2d0-4369-af9a-416abed500fa@amd.com> Date: Tue, 27 Jan 2026 12:35:06 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] drm/amdgpu: Fix TLB flush failures after hibernation resume To: "Ionut Nechita (Sunlight Linux)" , alexdeucher@gmail.com Cc: alexander.deucher@amd.com, amd-gfx@lists.freedesktop.org, christian.koenig@amd.com, dri-devel@lists.freedesktop.org, ionut_n2001@yahoo.com, linux-kernel@vger.kernel.org, superm1@kernel.org References: <20260126203749.16389-2-sunlightlinux@gmail.com> Content-Language: en-US From: =?UTF-8?Q?Christian_K=C3=B6nig?= In-Reply-To: <20260126203749.16389-2-sunlightlinux@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: FR4P281CA0205.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:e5::14) To PH7PR12MB5685.namprd12.prod.outlook.com (2603:10b6:510:13c::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR12MB5685:EE_|SJ2PR12MB7963:EE_ X-MS-Office365-Filtering-Correlation-Id: 693763ab-ed2a-42ea-5517-08de5d98220e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|366016|1800799024; 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I'll test this on my AMD Cezanne system over the next > few days when I have more time available, and will send you the complete > call chain information. > > Regarding the hibernation limitations you mentioned - I understand the > challenges with secure boot compatibility and VRAM eviction. In my case, > I'm not using secure boot, and my system has sufficient RAM and swap > space to handle the VRAM backup, so those particular issues shouldn't > affect my setup. the problem is since the AMD GPU doesn't official support hibernation you are pretty much the only one able to reproduce the bug. In other words I can't go to my manager to get a Cezanne system plus time to work on this. What Alex, Mario, I and all the other devs can do is to explain to you how the driver works and try to further debug what's going on here. > I'll follow up with the stack traces and additional debugging information > in the next few days. That would certainly be helpful. Thanks, Christian. > > Thanks again, > Ionut