I can't reproduce the issue on the XPS 9360 at my hand, which
unfortunately is not the mass production one, with both BIOS 2.3.1 (the
version you currently used) and 2.4.2.
The TBT's XHCI HC failed to suspend,
[ 87.718350] xhci_hcd 0000:39:00.0: WARN: xHC CMD_RUN timeout
[ 87.718372] suspend_common(): xhci_pci_suspend+0x0/0xd0 returns -110
[ 87.718377] pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 returns -110
[ 87.718385] dpm_run_callback(): pci_pm_suspend+0x0/0x130 returns -110
[ 87.718391] PM: Device 0000:39:00.0 failed to suspend async: error -110
Also we can see that:
01:00.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge
[Alpine Ridge 2C 2015] [8086:1576] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
02:00.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge
[Alpine Ridge 2C 2015] [8086:1576] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
02:01.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge
[Alpine Ridge 2C 2015] [8086:1576] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
02:02.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3 Bridge
[Alpine Ridge 2C 2015] [8086:1576] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: pcieport
Kernel modules: shpchp
03:00.0 System peripheral [0880]: Intel Corporation DSL6340 Thunderbolt 3 NHI
[Alpine Ridge 2C 2015] [8086:1575] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: thunderbolt
Kernel modules: thunderbolt
39:00.0 USB controller [0c03]: Intel Corporation DSL6340 USB 3.1 Controller
[Alpine Ridge] [8086:15b5] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: xhci_hcd
All these PCI devices are not responsive.
Can you attach the output `lspci` right after boot, without plugging any
USB-C/TBT device?
Also, can you upgrade your BIOS and Thunderbolt firmware? Hopefully this
can fix the issue.
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https://bugs.launchpad.net/bugs/1738224
Title:
Suspend broken after kernel upgrade
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