On 1/20/21 4:26 AM, Christian Helmuth wrote:
Hello John,
thanks for your efforts to pin down the issue. It's unfortunate that usb_drv just dies on your Yoga because it's essential for report_dump to work.
On Tue, Jan 19, 2021 at 22:28:33 CET, John J. Karcher wrote:
[core] Warning: unresolvable exception 13, pd 'init -> drivers -> usb_drv', thread 'ep', cpu 0, ip=0x1005afc sp=40bfe7c0 bp=0x1410a450 no signal handler
This message tells us that usb_drv raised a General Protection Fault, which can have many (fatal) reasons in the driver [1]. In the past, the cause was often misaligned pointer (incl. the stack pointer) in combination with FPU/SSE instructions, but it would be a wild guess in your case and also does not help to pin down the location in code.
Could you share some more information about the hardware specs of the Yoga? For example with a Live Linux
sudo lspci -vvvnn sudo lsusb -vvv sudo lshw -sanitize
Also, I suggest to move the bug hunt to a dedicated issue on GitHub [2].
Added as ticket #3997, with the above command outputs attached.
Thanks!
John J. Karcher devuser@alternateapproach.com