Ubuntu
linux package

  1. Zesty (17.04)
  2. Bug #1667750
  3. Comment #166

Comment 166 for bug 1667750

Revision history for this message
In , stf_xl (stfxl-linux-kernel-bugs) wrote :

We have this xhci_hcd warning on bad case:

 xhci_hcd 0000:15:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state

Not sure where it come from. But I notice you are using AMD IOMMU which we have troubles with with different drivers.

You could try to disable iommu via kerenl boot parameter and check if that improve things. You could also try test this patch if possible:
https://bugzilla.kernel.org/attachment.cgi?id=281675

If none of that helps I will prepare some rt2800 patches to see if this not caused by some of v4.19 .. v4.20 rt2800 commits:

0240564430c0 rt2800: flush and txstatus rework for rt2800mmio
adf26a356f13 rt2x00: use different txstatus timeouts when flushing
5022efb50f62 rt2x00: do not check for txstatus timeout every time on tasklet
0b0d556e0ebb rt2800mmio: use txdone/txstatus routines from lib
5c656c71b1bf rt2800: move usb specific txdone/txstatus routines to rt2800lib
f483039cf51a rt2x00: use simple_read_from_buffer()

But I would rather suspect problem introduced in AMD IOMMU or usb/xhci drivers.