On Tue, Dec 10, 2019 at 12:00:23PM +0000, Nicholas Johnson wrote: > The following is the culprit responsible for the issues: > > commit 586bc4aab878efcf672536f0cdec3d04b6990c94 > Author: Alex Deucher <alexander.deucher@xxxxxxx> > Date: Fri Nov 22 16:43:50 2019 -0500 > > ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD > > It is playing with PCI devices. Clearly they did not consider > hot-removal. I am guessing it is seeing the audio PCI func of the AMD > card in that Thunderbolt eGPU enclosure. > > I will collect information, make a bugzilla report and contact the AMD > team. If anybody wants to be cc'd in then let me know. Sorry for > bothering you and Bjorn with something which actually has nothing > directly to do with the PCI subsystem or Thunderbolt. No problem. Thanks for taking time to bisect the issue.