[Bug 2083538] Re: amdgpu: [mmhub] page fault (src_id:0 ring:8 vmid:6 pasid:32781 / Fence fallback timer expired on ring sdma0

Wed Oct 9 14:20:29 UTC 2024

** Description changed:

+ [ Impact ]
+ 
+  * amdgpu changes in kernel 6.11 make VAAPI video playback crash the GPU
+ and bring down the whole system.
+ 
+  * A fix was shipped in mesa 24.2, which is already in Oracular - the
+ only version with kernel 6.11 currently, but snaps bundle their own
+ version of mesa so core22 snaps like Firefox are affected. Firefox has
+ VAAPI disabled by default, but it can be enabled by the user.
+ 
+ [ Test Plan ]
+ 
+  * Set up a system with an AMD GPU running Ubuntu 24.10 with kernel 6.11
+ 
+  * Open Firefox
+ 
+  * Navigate to `about:config`
+ 
+  * Search `media.ffmpeg.vaapi.enabled`
+ 
+  * Enable the setting by clicking the toggle button
+ 
+  * Restart Firefox
+ 
+  * Play different videos on x.com or youtube.com
+    (I don't have a reliable reproducer unfortunately)
+ 
+  * Ensure that there are no green artifacts on the video playback
+ 
+  * Ensure that the system didn't lock up
+ 
+  * 10 minutes of scrolling through videos was generally enough to trigger
+    the bug in my testing
+ 
+ [ Where problems could occur ]
+ 
+  * The scope of the change is limited to the VAAPI driver for AMD GPUs
+    ( /usr/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so )
+    An issue with the change may break video playback.
+    But, as this bug demonstrated, a bug in the video acceleration driver
+    may also bring down the whole system...
+ 
+ [ Original Description ]
+ 
  It turns out that amdgpu in kernel 6.11 on the Ryzen 6850U is quite
  crashy and laggy. I have attached the previous boot log which shows a
  lot of errors.

  It does not seem to like firefox.

  Behavior visible is that it hangs, then tries resets, fails to reset and
  then the screen is unusable so I sysrq reboot it.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.10
  Package: linux-image-6.11.0-8-generic 6.11.0-8.8
  ProcVersionSignature: Ubuntu 6.11.0-8.8-generic 6.11.0
  Uname: Linux 6.11.0-8-generic x86_64
  ApportVersion: 2.30.0-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: GNOME
  Date: Wed Oct  2 19:06:47 2024
  InstallationDate: Installed on 2022-11-26 (676 days ago)
  InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20221126)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: LENOVO 21CF004PGE
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-8-generic root=/dev/mapper/ubuntu-root ro rootflags=subvol=@next quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M zswap.enabled=1 zswap.compressor=zstd zswap.max_pool_percent=20 zswap.zpool=zsmalloc vt.handoff=7
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
-  linux-restricted-modules-6.11.0-8-generic N/A
-  linux-backports-modules-6.11.0-8-generic  N/A
-  linux-firmware                            20240913.gita34e7a5f-0ubuntu2
+  linux-restricted-modules-6.11.0-8-generic N/A
+  linux-backports-modules-6.11.0-8-generic  N/A
+  linux-firmware                            20240913.gita34e7a5f-0ubuntu2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/29/2024
  dmi.bios.release: 1.53
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R23ET77W (1.53 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 21CF004PGE
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0T76538 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.32
  dmi.modalias: dmi:bvnLENOVO:bvrR23ET77W(1.53):bd05/29/2024:br1.53:efr1.32:svnLENOVO:pn21CF004PGE:pvrThinkPadT14Gen3:rvnLENOVO:rn21CF004PGE:rvrSDK0T76538WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21CF_BU_Think_FM_ThinkPadT14Gen3:
  dmi.product.family: ThinkPad T14 Gen 3
  dmi.product.name: 21CF004PGE
  dmi.product.sku: LENOVO_MT_21CF_BU_Think_FM_ThinkPad T14 Gen 3
  dmi.product.version: ThinkPad T14 Gen 3
  dmi.sys.vendor: LENOVO

** Description changed:

  [ Impact ]

-  * amdgpu changes in kernel 6.11 make VAAPI video playback crash the GPU
+  * amdgpu changes in kernel 6.11 make VAAPI video playback crash the GPU
  and bring down the whole system.

-  * A fix was shipped in mesa 24.2, which is already in Oracular - the
+  * A fix was shipped in mesa 24.2, which is already in Oracular - the
  only version with kernel 6.11 currently, but snaps bundle their own
  version of mesa so core22 snaps like Firefox are affected. Firefox has
  VAAPI disabled by default, but it can be enabled by the user.

  [ Test Plan ]

-  * Set up a system with an AMD GPU running Ubuntu 24.10 with kernel 6.11
+  * Set up a system with an AMD GPU running Ubuntu 24.10 with kernel 6.11

-  * Open Firefox
+  * Open Firefox

-  * Navigate to `about:config`
+  * Navigate to `about:config`

-  * Search `media.ffmpeg.vaapi.enabled`
+  * Search `media.ffmpeg.vaapi.enabled`

-  * Enable the setting by clicking the toggle button
+  * Enable the setting by clicking the toggle button

-  * Restart Firefox
+  * Restart Firefox

-  * Play different videos on x.com or youtube.com
-    (I don't have a reliable reproducer unfortunately)
+  * Play different videos on x.com or youtube.com
+    (I don't have a reliable reproducer unfortunately)

-  * Ensure that there are no green artifacts on the video playback
+  * Ensure that there are no green artifacts on the video playback

-  * Ensure that the system didn't lock up
+  * Ensure that the system didn't lock up

-  * 10 minutes of scrolling through videos was generally enough to trigger
-    the bug in my testing
+  * 10 minutes of scrolling through videos was generally enough to trigger
+    the bug in my testing.
+    Sometimes I could only get the green artifacts, other times I could get
+    the system to lock up.

  [ Where problems could occur ]

-  * The scope of the change is limited to the VAAPI driver for AMD GPUs
-    ( /usr/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so )
-    An issue with the change may break video playback.
-    But, as this bug demonstrated, a bug in the video acceleration driver
-    may also bring down the whole system...
+  * The scope of the change is limited to the VAAPI driver for AMD GPUs
+    ( /usr/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so )
+    An issue with the change may break video playback.
+    But, as this bug demonstrated, a bug in the video acceleration driver
+    may also bring down the whole system...

  [ Original Description ]

  It turns out that amdgpu in kernel 6.11 on the Ryzen 6850U is quite
  crashy and laggy. I have attached the previous boot log which shows a
  lot of errors.

  It does not seem to like firefox.

  Behavior visible is that it hangs, then tries resets, fails to reset and
  then the screen is unusable so I sysrq reboot it.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.10
  Package: linux-image-6.11.0-8-generic 6.11.0-8.8
  ProcVersionSignature: Ubuntu 6.11.0-8.8-generic 6.11.0
  Uname: Linux 6.11.0-8-generic x86_64
  ApportVersion: 2.30.0-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: GNOME
  Date: Wed Oct  2 19:06:47 2024
  InstallationDate: Installed on 2022-11-26 (676 days ago)
  InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20221126)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: LENOVO 21CF004PGE
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-8-generic root=/dev/mapper/ubuntu-root ro rootflags=subvol=@next quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M zswap.enabled=1 zswap.compressor=zstd zswap.max_pool_percent=20 zswap.zpool=zsmalloc vt.handoff=7
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
   linux-restricted-modules-6.11.0-8-generic N/A
   linux-backports-modules-6.11.0-8-generic  N/A
   linux-firmware                            20240913.gita34e7a5f-0ubuntu2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/29/2024
  dmi.bios.release: 1.53
  dmi.bios.vendor: LENOVO
  dmi.bios.version: R23ET77W (1.53 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 21CF004PGE
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0T76538 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.32
  dmi.modalias: dmi:bvnLENOVO:bvrR23ET77W(1.53):bd05/29/2024:br1.53:efr1.32:svnLENOVO:pn21CF004PGE:pvrThinkPadT14Gen3:rvnLENOVO:rn21CF004PGE:rvrSDK0T76538WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21CF_BU_Think_FM_ThinkPadT14Gen3:
  dmi.product.family: ThinkPad T14 Gen 3
  dmi.product.name: 21CF004PGE
  dmi.product.sku: LENOVO_MT_21CF_BU_Think_FM_ThinkPad T14 Gen 3
  dmi.product.version: ThinkPad T14 Gen 3
  dmi.sys.vendor: LENOVO

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https://bugs.launchpad.net/bugs/2083538

Title:
  amdgpu: [mmhub] page fault (src_id:0 ring:8 vmid:6 pasid:32781 / Fence
  fallback timer expired on ring sdma0

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