On 2.12.2021 16.55, Robert Munteanu wrote: > Hi, > > After updating from kernel 5.14.11 to 5.14.14 I am seeing the following > problem: > > When plugging in an USB scanner ( Brother DSMobile DS-740D ) to my > Lenovo P52 laptop I lose connection to all USB devices. Not only are > the devices no longer available on the host, but no power is drawn by > them. Only a reboot fixes the problem. > > The scanner is the only device that triggers the problem, even when it > is the only device plugged in. I have a host of other devices, > connected either directly or via a USB hub in my monitor: > There is one xhci patch in that range that has caused other issues: ff0e50d3564f xhci: Fix command ring pointer corruption while aborting a command That patch has a fix that is not yet applied, fix can be found here: https://lore.kernel.org/linux-usb/20211126122340.1193239-2-mathias.nyman@xxxxxxxxxxxxxxx/ or https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/commit/?h=for-usb-linus&id=385b5b09c3546c87cfb730b76abe5f8d73c579a2 Does reverting the original patch, or applying the fix help? Thanks -Mathias
