Hi Ganapathi, I'm making progress with figuring out potential workarounds for this issue right now, seems like the "Firmware wakeup failed" error on resume indeed is caused by another issue (that might still be related to PCI connection/ASPM issues) than the command timeout: I wasn't seeing the "Firmware wakeup failed" error at all so far, it only started appearing after I went back to a clean kernel and tried disabling L1.2 to fix the command timeout. While that indeed fixed the command timeout issue, the "Firmware wakeup failed" issue wasn't fixed. Turns out I had at least two changes in my modified kernel sources that (combined) fix the "Firmware wakeup failed" issue, I'm trying to isolate those changes right now.
Your testing setup sounds correct and should trigger the "Firmware wakeup failed" issue (it happens after only two suspend cycles here), maybe make sure that S0Ix sleep is actually reached during suspend by checking if /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us and /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us are not 0. The command timeout should happen quite quickly (less than 5 minutes) when downloading data, although I can't say anything for devices other than my Pro 2017, the occurrences might be a lot rarer on other devices. You can check which L-states and substates are enabled by executing "lspci -vvv" as root. The L0s and L1 state can be found under "Capabilities: Express (v2) Endpoint -> LnkCtl" and the L1-substates can be found under "Capabilities: L1 PM Substates -> L1SubCtl1" (enabled substates are marked with a "+" after the state, disabled ones with a "-"). Or you can compile your kernel with CONFIG_PCIEASPM_DEBUG and read the value from /sys/bus/pci/devices/PARENT_BRIDGE/power/link_state Thanks, Jonas -- 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/1730924 Title: Wifi does down "crash" in Surface Pro 4 Status in Linux: Confirmed Status in linux package in Ubuntu: Incomplete Bug description: I have a Surface Pro 4. The wifi works well in principle, but unfortunately it drops every x minutes. The only way to fix it I've found is to reboot the computer. lsb_release -rd Description: Ubuntu 17.10 Release: 17.10 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-16-generic 4.13.0-16.19 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: predatux 1537 F.... pulseaudio CurrentDesktop: KDE Date: Wed Nov 8 10:41:26 2017 HibernationDevice: RESUME=UUID=147af4ba-a4ce-41fe-a176-b36a1f6a590b Lsusb: Bus 002 Device 002: ID 045e:090c Microsoft Corp. Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 045e:07e8 Microsoft Corp. Bus 001 Device 003: ID 1286:204c Marvell Semiconductor, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Microsoft Corporation Surface Pro 4 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic root=UUID=125200b0-7377-4985-a217-15503781a525 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-generic N/A linux-backports-modules-4.13.0-16-generic N/A linux-firmware 1.169 SourcePackage: linux UpgradeStatus: Upgraded to artful on 2017-10-22 (16 days ago) dmi.bios.date: 02/24/2017 dmi.bios.vendor: Microsoft Corporation dmi.bios.version: 106.1624.768 dmi.board.name: Surface Pro 4 dmi.board.vendor: Microsoft Corporation dmi.chassis.type: 9 dmi.chassis.vendor: Microsoft Corporation dmi.modalias: dmi:bvnMicrosoftCorporation:bvr106.1624.768:bd02/24/2017:svnMicrosoftCorporation:pnSurfacePro4:pvrD0B08F1C03P38:rvnMicrosoftCorporation:rnSurfacePro4:rvr:cvnMicrosoftCorporation:ct9:cvr: dmi.product.family: Surface dmi.product.name: Surface Pro 4 dmi.product.version: D:0B:08F:1C:03P:38 dmi.sys.vendor: Microsoft Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1730924/+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
