SRU: * https://kernel.ubuntu.com/forgejo/kernel/noble-linux-oem/pulls/219 (oem-6.11) * https://kernel.ubuntu.com/forgejo/kernel/noble-linux-oem/pulls/220 (oem-6.14)
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2112462 Title: Unexpected system reboot at loading GUI session on some AMD platforms Status in linux package in Ubuntu: Confirmed Status in linux-oem-6.11 package in Ubuntu: Invalid Status in linux-oem-6.14 package in Ubuntu: Invalid Status in linux-oem-6.8 package in Ubuntu: Invalid Status in linux source package in Noble: Confirmed Status in linux-oem-6.11 source package in Noble: In Progress Status in linux-oem-6.14 source package in Noble: In Progress Status in linux-oem-6.8 source package in Noble: In Progress Status in linux source package in Oracular: Confirmed Status in linux-oem-6.11 source package in Oracular: Invalid Status in linux-oem-6.14 source package in Oracular: Invalid Status in linux-oem-6.8 source package in Oracular: Invalid Status in linux source package in Plucky: Confirmed Status in linux-oem-6.11 source package in Plucky: Invalid Status in linux-oem-6.14 source package in Plucky: Invalid Status in linux-oem-6.8 source package in Plucky: Invalid Status in linux source package in Questing: Confirmed Status in linux-oem-6.11 source package in Questing: Invalid Status in linux-oem-6.14 source package in Questing: Invalid Status in linux-oem-6.8 source package in Questing: Invalid Bug description: [SRU Justification] [ Impact ] AMD Strix Halo devices experience unexpected reboots while starting GUI session every boot. This is caused by: * 689275140cb8e drm/amdgpu/hdp7.0: do a posting read when flushing HDP * abe1cbaec6cfe drm/amdgpu/hdp6.0: do a posting read when flushing HDP * f756dbac1ce1d drm/amdgpu/hdp5.2: do a posting read when flushing HDP * cf424020e040b drm/amdgpu/hdp5.0: do a posting read when flushing HDP * c9b8dcabb52af drm/amdgpu/hdp4.0: do a posting read when flushing HDP And fixed by: * 5a11a27677311 drm/amdgpu/hdp7: use memcfg register to post the write for HDP flush * ca28e80abe421 drm/amdgpu/hdp6: use memcfg register to post the write for HDP flush * dbc988c689333 drm/amdgpu/hdp5.2: use memcfg register to post the write for HDP flush * 0e33e0f339b91 drm/amdgpu/hdp5: use memcfg register to post the write for HDP flush * f690e3974755a drm/amdgpu/hdp4: use memcfg register to post the write for HDP flush [ Test Plan ] 1. Install -proposed kernel 2. Reboot to the installed kernel and check if the device may finish boot process to GUI session. [ Where problems could occur ] No. This fix a problem when reading back the whole mapped KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL register by reading another register that also triggers the flush. [ Other Info ] The causing commits were first committed to v6.13-rc1 , and have also been backported to v6.12.5, v6.6.69, v6.1.120. The fixes are available in v5.15-rc6, also backported to v6.14.7, v6.12.29, v6.6.91, v6.1.139, therefore this affects following Ubuntu kernels: * linux-unstable/questing: latest (currently 6.15.0-2.2) * linux/plucky: all (currently 6.14.0-22.22) * linux-oem-6.14/noble: all (currently 6.14.0-1005.5) * linux/oracular: 6.11.0-20.20 to latest (currently 6.11.0-28.28) * linux-oem-6.11/noble: 6.11.0-1017.17 to latest (currently 6.11.0-1024.24) * linux/noble: 6.8.0-58.60 to latest (currently 6.8.0-62.65) * linux-oem-6.8/noble: 6.8.0-1026.26 to latest (currently 6.8.0-1029.29) Nominate for linux/noble, linux-oem-6.8/noble, linux/oracular, linux- oem-6.11/noble, linux/plucky, linux-oem-6.14/noble, and linux- unstable. ========== original bug report ========== With 5 v6.13-rc1 commits , also backported to v6.12.5, v6.6.69, v6.1.120, some (at least AMD Strix Halo) devices may experience unexpected reboots while starting GUI session every boot: * 689275140cb8e drm/amdgpu/hdp7.0: do a posting read when flushing HDP * abe1cbaec6cfe drm/amdgpu/hdp6.0: do a posting read when flushing HDP * f756dbac1ce1d drm/amdgpu/hdp5.2: do a posting read when flushing HDP * cf424020e040b drm/amdgpu/hdp5.0: do a posting read when flushing HDP * c9b8dcabb52af drm/amdgpu/hdp4.0: do a posting read when flushing HDP The fixes are available in v5.15-rc6, also backported to v6.14.7, v6.12.29, v6.6.91, v6.1.139: * 5a11a27677311 drm/amdgpu/hdp7: use memcfg register to post the write for HDP flush * ca28e80abe421 drm/amdgpu/hdp6: use memcfg register to post the write for HDP flush * dbc988c689333 drm/amdgpu/hdp5.2: use memcfg register to post the write for HDP flush * 0e33e0f339b91 drm/amdgpu/hdp5: use memcfg register to post the write for HDP flush * f690e3974755a drm/amdgpu/hdp4: use memcfg register to post the write for HDP flush This affects following Ubuntu kernels: * linux-unstable/questing: latest (currently 6.15.0-2.2) * linux/plucky: all (currently 6.14.0-22.22) * linux-oem-6.14/noble: all (currently 6.14.0-1005.5) * linux/oracular: 6.11.0-20.20 to latest (currently 6.11.0-28.28) * linux-oem-6.11/noble: 6.11.0-1017.17 to latest (currently 6.11.0-1024.24) * linux/noble: 6.8.0-58.60 to latest (currently 6.8.0-62.65) * linux-oem-6.8/noble: 6.8.0-1026.26 to latest (currently 6.8.0-1029.29) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2112462/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
