https://bugzilla.kernel.org/show_bug.cgi?id=214901 --- Comment #3 from spasswolf@xxxxxx --- Actually the above message is not complete: Nov 1 00:22:49 bart kernel: [ 2.136382] kfd kfd: amdgpu: Allocated 3969056 bytes on gart Nov 1 00:22:49 bart kernel: [ 2.136462] kfd kfd: amdgpu: error getting iommu info. is the iommu enabled? Nov 1 00:22:49 bart kernel: [ 2.136470] kfd kfd: amdgpu: Error initializing iommuv2 Nov 1 00:22:49 bart kernel: [ 2.137386] kfd kfd: amdgpu: device 1002:9874 NOT added due to errors Nov 1 00:22:49 bart kernel: [ 2.137393] kfd kfd: amdgpu: Failed to resume IOMMU for device 1002:9874 Nov 1 00:22:49 bart kernel: [ 2.137397] amdgpu 0000:00:01.0: amdgpu: amdgpu_device_ip_init failed Nov 1 00:22:49 bart kernel: [ 2.137402] amdgpu 0000:00:01.0: amdgpu: Fatal error during GPU init Nov 1 00:22:49 bart kernel: [ 2.137406] amdgpu 0000:00:01.0: amdgpu: amdgpu: finishing device. Nov 1 00:22:49 bart kernel: [ 2.139639] BUG: kernel NULL pointer dereference, address: 00000000000001db The messages from kfd have been there with older kernels, too, but were not fatal. They are caused by the HP Laptop 15-bw0xx/8332, not having a iommu or its BIOS not properly initializing it. But linux-5.15 has added the following lines to the amdgpu_device_ip_init: r = amdgpu_amdkfd_resume_iommu(adev); if (r) goto init_failed; which make causes the amdgpu_device_ip_init function to fail when kfd init fails. As a workaround one could remove these. A BIOS update could perhaps also solve the problem but seems to require a Windows running on the Laptop (which was actually sold without Windows) -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
