USB-3/PCIe Root/Thunderbolt fail to load

[Daegalus]

I have been running 18.04 Beta fine for about a week and a half, but on Monday, after upgrading a bunch of packages and my kernel, My USB-C external monitors no longer work. They worked fine before. I tried downgrading the kernel, but that didn't change anything.

I have attached a full dmesg log from boot, and a dmesg log for repluggig the usb-c cable. the PCIe Root is a Intel Sunrise and the machine is a Dell XPS 13 9360.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

So booting back into the prior kernel version does not make the bug go away?

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc1/

[Daegalus (yulian)]

Old kernel did not work (4.13 i believe)

Just installed 4.16 from the mainline builds (went with 4.16 and not 4.16.1-4.16.3

I have attached a new dmesg from the 4.16 kernel if it will help. At the end it has me replugging the cable.

[Daegalus (yulian)]

seems to be a firmware/bios issue on the machine, not the kernel.