[18:30] <isene> With kernel 4.10.0-21-generic I can do ' cat /sys/class/power_supply/BAT0/capacity ' but with the latest kernel 4.10.0-37-generic it hangs. Also, I cannot do ' sudo systemctl suspend ' with the latest (but this does work with the older 4.10.0-21-generic). HW = Dell XPS 15 (Ubuntu 17.04 up-to-date). Any ideas why this is?
[18:30] <isene> I should add that the -21 kernel will boot fine, but any later kernel must have ' nouveau.modeset=0 ' in the GRUB_CMDLINE_LINUX_DEFAULT
[18:31] <isene> I don't get any feedback or error message with that cat command on the latest kernel - is just hangs indefinitely 
[18:44] <isene> s/is/it/
[18:53] <apw> isene, could you file a bug with this information in it (ubuntu-bug linux) and drop the bug number in here so we can find it
[18:53] <apw> isene, also could you put the exact versions you have tried and which were good and bad so we can try and locate this
[19:28] <isene> Like this? https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723785
[20:05] <apw> isene: looks believable, just make sure it has any and all versions you have tested and whether they hung or not
[20:12] <isene> I will do further testing tomorrow and add logs to the report.