On Thu, Oct 21, 2021 at 6:55 PM Gabriel <git@xxxxxxxxxx> wrote: > > [1.] One line summary of the problem: > > Laptop kills USB-C hubs. > > > [2.] Full description of the problem/report: > > I own a ThinkPad T14s (AMD) and used a USB-C Hub [a] without any > problems for half a year. Then, I bought a new ThinkPad E15 Gen3 (AMD) > and used it with my USB-C hub, which worked fine at the beginning. After > a few days, the USB-C hub stopped working. I thought nothing of it and > ordered a new one [b]. > The new one worked fine for 1-2 days, until the HDMI ports stopped > working while being connected to the new laptop. USB/Ethernet ports > continued to work. > I ordered the USB-C hub [b] again. Same story, except it died > completely. All ports stopped working. > > I noticed a kernel warning [6.], which is the same for all three USB-C > hub deaths. This only happened after the system woke up from susped mode. > > I dont't know if this is a hardware or kernel issue. Unfortunately I > can't debug this any further, because I don't have any excess USB-C hubs > to brick. There was a recent regression in the driver related to USB-C DP alt-mode not working after resume from suspend in some cases. You can find more details and the fix on this bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1735 I haven't heard of any damage to hardware however. Alex
