I haven't seen this issue yet.
But from lspci in #38, the Thunderbolt controller disappears or lost power:
08:01.0 PCI bridge [0604]: Intel Corporation DSL6540 Thunderbolt 3 Bridge
[Alpine Ridge 4C 2015] [8086:1578] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
08:04.0 PCI bridge [0604]: Intel Corporation DSL6540 Thunderbolt 3 Bridge
[Alpine Ridge 4C 2015] [8086:1578] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
0a:00.0 PCI bridge [0604]: Intel Corporation DSL6540 Thunderbolt 3 Bridge
[Alpine Ridge 4C 2015] [8086:1578] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
0b:01.0 PCI bridge [0604]: Intel Corporation DSL6540 Thunderbolt 3 Bridge
[Alpine Ridge 4C 2015] [8086:1578] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
0b:04.0 PCI bridge [0604]: Intel Corporation DSL6540 Thunderbolt 3 Bridge
[Alpine Ridge 4C 2015] [8086:1578] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
0c:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1042A USB 3.0 Host
Controller [1b21:1142] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: xhci_hcd
Do you also see the same from `lspci` when the issue happens?
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https://bugs.launchpad.net/bugs/1766076
Title:
USB over thunderbolt turns off every once in a while
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