On Mon, Feb 03, 2020 at 03:28:11PM +0200, Heikki Krogerus wrote: > Hi, > > On Mon, Feb 03, 2020 at 10:52:52AM +0530, Shah, Nehal-bakulchandra wrote: > > Currently i am working on enabling UCSI support > > for CCGx based controller on AMD GPU Cards. > > > > Now i am observing the issue reported here when > > i unplug the cable. > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1762031 > > > > Also would like to know is there any way we can > > get user level notifications for UCSI? > > If you want to see the actual UCSI notification in user space, then > that is not possible, but the driver does produce trace output, and I > would actually like to see what we got there. You need debugfs to be > mounted. Then try the following: > > # Unload all UCSI modules > modprobe -r ucsi_acpi > > # At this point you should plug-in the problematic device > > # Reload the UCSI core module > modprobe typec_ucsi > > # Enable UCSI tracing > echo 1 > /sys/kernel/debug/tracing/events/ucsi/enable > > # Now reload the ACPI glue driver > modprobe ucsi_acpi > > # Unplug the problematic device so that you see the error > > # Finally dump the trace output > cat /sys/kernel/debug/tracing/trace > > So if that works, please send the trace output to me. Actually, first things first. Please share your dmesg output. Are you using ucsi_acpi or ucsi_ccg glue driver? thanks, -- heikki
