On Tue, May 21, 2019 at 04:49:14PM -0500, Adam Gausmann wrote: > On my ThinkPad E585, with a Ryzen 5 2500U, my XHCI driver crashes when > plugging in a device after switching power states, or during switching itself. > > Steps to Reproduce: > > - Unplug the AC power, or start the computer with AC unplugged. If the > computer has AC power at boot, it will work properly, but plugging it in > after running unplugged will not. > > The xhci_hcd and xhci_pci modules remain loaded after the error. Reloading > them appears to reset it, and the scenarios above still apply as if the > computer was just started. > > These tests were performed with laptop_mode disabled; enabling it alters the > behavior. I will test that more later. > > Results: > > The USB device fails to register, and `lsusb` remains unchanged. No other > errors will appear after the first one occurs. > One of two error messages will appear in kernel logs: > > [ 51.276650] xhci_hcd 0000:05:00.4: Refused to change power state, > currently in D3 > [ 51.276658] xhci_hcd 0000:05:00.3: Refused to change power state, > currently in D3 > [ 51.277051] xhci_hcd 0000:05:00.3: enabling device (0000 -> 0002) > [ 51.277074] xhci_hcd 0000:05:00.3: WARN: xHC restore state timeout > [ 51.277077] xhci_hcd 0000:05:00.3: PCI post-resume error -110! > [ 51.279316] xhci_hcd 0000:05:00.3: HC died; cleaning up > [ 51.288669] xhci_hcd 0000:05:00.4: enabling device (0000 -> 0002) > > [ 5258.438021] xhci_hcd 0000:05:00.3: Refused to change power state, > currently in D3 > [ 5258.438328] xhci_hcd 0000:05:00.4: Refused to change power state, > currently in D3 > [ 5258.450026] xhci_hcd 0000:05:00.3: enabling device (0000 -> 0002) > [ 5258.450511] xhci_hcd 0000:05:00.4: enabling device (0000 -> 0002) > [ 5266.112941] xhci_hcd 0000:05:00.3: Error while assigning device slot ID > [ 5266.112952] xhci_hcd 0000:05:00.3: Max number of devices this xHCI host > supports is 64. > [ 5266.112963] usb usb1-port2: couldn't allocate usb_device > [ 5280.960968] xhci_hcd 0000:05:00.3: Error while assigning device slot ID > [ 5280.960979] xhci_hcd 0000:05:00.3: Max number of devices this xHCI host > supports is 64. > [ 5280.960993] usb usb1-port2: couldn't allocate usb_device > > Expected results: > > Device connects, powers on, and registers properly, showing up in `lsusb`. > > Build: > > Linux 4.19.44_1 #1 SMP PREEMPT Wed Mar 27 20:41:38 UTC 2019 x86_64 GNU/Linux, > with firmware 20181218
4.19 is pretty old for xhci and normal desktop systems. Can you please try 5.1 and see if that resolves the issue or not? thanks, greg k-h
