[Bug 220904] [BUG] ucsi_acpi: USB 3.0 SuperSpeed not negotiated on USB-C hot-plug

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220904

Thomas Jetzinger (thomas@jetzinger.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |ANSWERED

--- Comment #15 from Thomas Jetzinger (thomas@jetzinger.com) ---
TLP blocks xhci_hcd from runtime PM by default, which caused my xHCI controller
to fail resume with "root hub lost power" errors.

I didn't realize TLP was the culprit, so I added xhci_hcd.quirks=0x80 to force
resets on resume. That fixed suspend/resume but broke hot-plug.

Proper fix:
- Remove xhci_hcd from TLP's RUNTIME_PM_DRIVER_DENYLIST in /etc/tlp.conf (if
installed)
- Remove xhci_hcd.quirks=0x80 from kernel command line (or never add it)

Both suspend/resume and hot-plug now work correctly. Other ThinkPad users with
TLP defaults might hit this same issue.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.