** Tags added: originate-from-2033332 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.1 in Ubuntu. https://bugs.launchpad.net/bugs/2033025
Title: Fix numerous AER related issues Status in HWE Next: New Status in OEM Priority Project: New Status in linux package in Ubuntu: Fix Committed Status in linux-oem-6.1 package in Ubuntu: Invalid Status in linux-oem-6.5 package in Ubuntu: Invalid Status in linux source package in Jammy: Won't Fix Status in linux-oem-6.1 source package in Jammy: Fix Committed Status in linux-oem-6.5 source package in Jammy: Fix Released Status in linux source package in Lunar: Fix Committed Status in linux-oem-6.1 source package in Lunar: Invalid Status in linux-oem-6.5 source package in Lunar: Invalid Status in linux source package in Mantic: Fix Committed Status in linux-oem-6.1 source package in Mantic: Invalid Status in linux-oem-6.5 source package in Mantic: Invalid Bug description: [Impact] Numerous issues triggered from AER/DPC services - When AER is shared with PME, cutting the power off the device can trigger AER IRQ. Since AER IRQ is shared with PME, it's treated like a wakeup source, preventing the system from entering sleep. - When system resume from S3, device can reset itself and start sending PTM messages, triggering AER and reset the entire hierarchy. Since the hardware/firmware starts before software, it's never soon enough to put a band-aid from kernel. - Following above one, device firmware restarts before kernel resume, when DPC is triggered then the device is gone without any recovering method. We really want to prevent that from happening. [Fix] Disable and re-enable AER and DPC services on suspend and resume, respectively. Right now the the PCI mailing list doesn't have a consensus which PCI state (D3hot vs D3cold) should the AER/DPC services should be disabled, so re-instate the old workaround for now. [Test] One the workaround is applied, symptoms described above can no longer be observed. [Where problems could occur] Theoretically there can be some "real" issues get unnoticed once AER gets temporarily disabled, but the benefit far outweighs the downside. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2033025/+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
