Hi Ganapathi, > OK; Thanks for this; I read it as 'these two issues have different root > causes';
Not sure if that's the case since we enable link power saving after every suspend again. > it is enabled(above output of lspci -vvv); but is there a seperate check to > know if it could be *entered*; I don't think there is, maybe there are unofficial debugging tools by Intel or related manufacturers to read statistics about those states from the chipset. > cat: /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us: No > such file or directory Sounds like the processor used in the Pro 4 isn't new enough, from the cpu residency it sounds like S0Ix is working. You can read more about those states here: https://01.org/blogs/qwang59/2018/how-achieve-s0ix- states-linux Also I figured out what the fix for the "Firmware wakeup failed" errors I wrote about was: Sleeping for about a second before writing to the PCI power state register, so not really a fix, just a workaround... If you fail to reproduce the issue on the Pro 4 maybe you can get a Pro 2017 and try it on that? Thanks, Jonas -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730924 Title: Wifi does down "crash" in Surface Pro 4 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1730924/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
