Comment 32 for bug 2068738

I just loaded Linux Mint Kernel 5.15.0-113 and it is not recognized at all, I'm told to load a Kernel first, press any key and I have to go back to the index of Linux Kernels and choose 5.15.0-107 to power up.

Thanks, Ralph

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On Tuesday, June 18th, 2024 at 7:12 AM, Roger Ramjet <email address hidden> wrote:

> Thank you Matthew.
>
>
>
>
> Sent with Proton Mail secure email.
>
>
> On Tuesday, June 18th, 2024 at 2:41 AM, Matthew Ruffell <email address hidden> wrote:
>
> > Hi everyone,
> >
> > I spoke with Stefan Bader of the Kernel Team again. They are planning to include
> > the patch in a respin of the current 2024.06.10 SRU cycle. https://kernel.ubuntu.com/
> >
> > I will let you know once the kernel has been built and placed into -proposed for
> > verification.
> >
> > But at this stage, as long as the respin occurs, this should be released the
> > week of 8th July, give or take a few days, if anything else pops up.
> >
> > Thanks,
> > Matthew
> >
> > --
> > You received this bug notification because you are subscribed to a
> > duplicate bug report (2069485).
> > https://bugs.launchpad.net/bugs/2068738
> >
> > Title:
> > AMD GPUs fail with null pointer dereference when IOMMU enabled,
> > leading to black screen
> >
> > Status in linux package in Ubuntu:
> > Fix Released
> > Status in linux source package in Jammy:
> > Fix Committed
> >
> > Bug description:
> > BugLink: https://bugs.launchpad.net/bugs/2068738
> >
> > [Impact]
> >
> > On systems with AMD Picasso/Raven 2 GPU devices, when the IOMMU is
> > enabled, the system fails to boot correctly, and all users see is a
> > black screen.
> >
> > This is caused by a null pointer dereference when enabling the IOMMU
> > after the device has been initialised. It should happen the other way
> > around.
> >
> > AMD-Vi: AMD IOMMUv2 loaded and initialized
> > ...
> > amdgpu: Topology: Add APU node [0x15d8:0x1002]
> > kfd kfd: amdgpu: added device 1002:15d8
> > kfd kfd: amdgpu: Failed to resume IOMMU for device 1002:15d8
> > ...
> > amdgpu 0000:06:00.0: amdgpu: amdgpu_device_ip_init failed
> > amdgpu 0000:06:00.0: amdgpu: Fatal error during GPU init
> > amdgpu 0000:06:00.0: amdgpu: amdgpu: finishing device.
> > ...
> > BUG: kernel NULL pointer dereference, address: 000000000000013c
> > ...
> > CPU: 1 PID: 223 Comm: systemd-udevd Not tainted 5.15.0-112-generic #122-Ubuntu
> > ...
> > RIP: 0010:amdgpu_dm_fini+0x149/0x1f0 [amdgpu]
> > ...
> > Call Trace:
> > <TASK>
> >
> > ? srso_return_thunk+0x5/0x10
> > ? show_trace_log_lvl+0x28e/0x2ea
> > ? show_trace_log_lvl+0x28e/0x2ea
> > ? dm_hw_fini+0x23/0x30 [amdgpu]
> > ? show_regs.part.0+0x23/0x29
> > ? __die_body.cold+0x8/0xd
> > ? __die+0x2b/0x37
> > ? page_fault_oops+0x13b/0x170
> > ? srso_return_thunk+0x5/0x10
> > ? do_user_addr_fault+0x321/0x670
> > ? srso_return_thunk+0x5/0x10
> > ? __free_pages_ok+0x34a/0x4f0
> > ? exc_page_fault+0x77/0x170
> > ? asm_exc_page_fault+0x27/0x30
> > ? amdgpu_dm_fini+0x149/0x1f0 [amdgpu]
> > dm_hw_fini+0x23/0x30 [amdgpu]
> > amdgpu_device_ip_fini_early.isra.0+0x278/0x312 [amdgpu]
> > amdgpu_device_fini_hw+0x156/0x208 [amdgpu]
> > amdgpu_driver_unload_kms+0x69/0x90 [amdgpu]
> > amdgpu_driver_load_kms.cold+0x81/0x107 [amdgpu]
> > amdgpu_pci_probe+0x1d1/0x290 [amdgpu]
> > local_pci_probe+0x4b/0x90
> > ? srso_return_thunk+0x5/0x10
> > pci_device_probe+0x119/0x200
> > really_probe+0x222/0x420
> > __driver_probe_device+0xe8/0x140
> > driver_probe_device+0x23/0xc0
> > __driver_attach+0xf7/0x1f0
> > ? __device_attach_driver+0x140/0x140
> > bus_for_each_dev+0x7f/0xd0
> > driver_attach+0x1e/0x30
> > bus_add_driver+0x148/0x220
> > ? srso_return_thunk+0x5/0x10
> > driver_register+0x95/0x100
> > __pci_register_driver+0x68/0x70
> > amdgpu_init+0x7c/0x1000 [amdgpu]
> > ? 0xffffffffc0e0b000
> > do_one_initcall+0x49/0x1e0
> > ? srso_return_thunk+0x5/0x10
> > ? kmem_cache_alloc_trace+0x19e/0x2e0
> > do_init_module+0x52/0x260
> > load_module+0xb45/0xbe0
> > __do_sys_finit_module+0xbf/0x120
> > __x64_sys_finit_module+0x18/0x20
> > x64_sys_call+0x1ac3/0x1fa0
> > do_syscall_64+0x56/0xb0
> > ...
> > entry_SYSCALL_64_after_hwframe+0x67/0xd1
> >
> > A workaround does exist. Users can set "nomodeset" or "amd_iommu=off"
> > to GRUB_CMDLINE_LINUX_DEFAULT, update-grub and reboot.
> >
> > [Fix]
> >
> > The regression was caused by the following commit that landed in
> > 5.15.0-112-generic, and 5.15.150 upstream:
> >
> > commit 3c7e53c0d4b43ffe6e7715414b5f2b3177881ecd ubuntu-jammy
> > Author: Yifan Zhang <email address hidden>
> >
> > Date: Tue Sep 28 15:42:35 2021 +0800
> > Subject: drm/amdgpu: init iommu after amdkfd device init
> > Link: https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/commit/?id=3c7e53c0d4b43ffe6e7715414b5f2b3177881ecd
> >
> > The fix is to revert this patch, as it was not suppose to be
> > backported to 5.15 stable.
> >
> > The mailing list discussion with AMD developers is:
> >
> > https://<email address hidden>/
> >
> > The fix hasn't been acknowledged by Greg KH or Sasha Levin yet, so
> > sending as a Ubuntu SAUCE patch. If the upstream status changes, we
> > can NAK and resend.
> >
> > [Testcase]
> >
> > You need a system with an AMD Picasso/Raven 2 device. It will likely
> > be an APU, and not a discrete graphics card, but any AMD Picasso/Raven
> > 2 device is affected.
> >
> > Install the kernel and boot. Make sure full modesetting is enabled.
> >
> > There is a test kernel available in the ppa below:
> >
> > https://launchpad.net/~mruffell/+archive/ubuntu/lp2068738-test
> >
> > If you install the test kernel, your system should boot successfully.
> >
> > [Where problems could occur]
> >
> > We are reverting a problematic patch and going back to how it was
> > before 5.15.0-112-generic. This should not cause any issues for users.
> >
> > If a regression were to occur, users can set "nomodeset" or
> > "amd_iommu=off" to GRUB_CMDLINE_LINUX_DEFAULT and reboot, or pin their
> > kernel to a working one.
> >
> > The impact of a regression would be high, as users displays could be
> > blank.
> >
> > [Other Info]
> >
> > User reports:
> > https://forums.linuxmint.com/viewtopic.php?t=421484
> > https://forums.linuxmint.com/viewtopic.php?t=421441
> > https://www.reddit.com/r/Ubuntu/comments/1d9uviz/had_to_purge_kernel_5150112_could_not_boot/
> > https://www.reddit.com/r/linuxmint/comments/1d9w6c9/kernel_5150112_boot_failure/
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2068735
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2068793
> > https://bugs.launchpad.net/bugs/2068812
> >
> > As bizarre as it is, this commit was actually originally included in
> > 5.15-rc5:
> >
> > commit 714d9e4574d54596973ee3b0624ee4a16264d700
> > Author: Yifan Zhang <email address hidden>
> >
> > Date: Tue Sep 28 15:42:35 2021 +0800
> > Subject: drm/amdgpu: init iommu after amdkfd device init
> > Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=714d9e4574d54596973ee3b0624ee4a16264d700
> >
> > It seems to have caused issues back then too, and was removed in the
> > following fixups, in 5.16-rc1:
> >
> > commit 93cec184788b0cf3926bc1f7b47fed74ba87990c
> > Author: James Zhu <email address hidden>
> >
> > Date: Tue Nov 2 21:33:50 2021 -0400
> > Subject: drm/amdgpu: remove duplicated kfd_resume_iommu
> > Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93cec184788b0cf3926bc1f7b47fed74ba87990c
> >
> > commit 9f4f2c1a35248f56b2a9c1c004e0aaff3609b15d
> > Author: shaoyunl <email address hidden>
> >
> > Date: Fri Nov 5 12:34:14 2021 -0400
> > Subject: drm/amd/amdgpu: fix the kfd pre_reset sequence in sriov
> > Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9f4f2c1a35248f56b2a9c1c004e0aaff3609b15d
> >
> > I'm not exactly in favor of rewriting history twice, so I think we
> > should just revert the upstream stable patch and move on.
> >
> > To manage notifications about this bug go to:
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2068738/+subscriptions