Follow-up Comment #4, bug #36740 (project grub): Hi,
Horst, please, send here output of lspci -vvv and lsusb -vvv There is something strange - RS232 converter is (most probably) of USB 1.1 type, i.e. it cannot be connected into EHCI - EHCI itself cannot manage USB 1.1 devices. So, there is maybe some integrated USB hub between EHCI and device - or USB 1.1 devices are manged via xHCI (I don't know if it is possible, I didn't study it yet). BR, Ales _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?36740> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/ _______________________________________________ Bug-grub mailing list Bug-grub@gnu.org https://lists.gnu.org/mailman/listinfo/bug-grub