Hi,
I have experienced strange problems when switching on the Dell Vostro 3750 laptop with any USB device connected to the USB 3.0 capable connector.
The system simply hangs, after the following error message is displayed:
[Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
However the same text is displayed also during successful boots (without any device in USB3.0 port).
I have recorded some logs using the netconsole, and I have performed some experiments with removal of xhci-hcd driver (its removal has not cured the problem, even though the device was not recognized
without xhci-hcd, when plugged in after boot, it still caused hang of the system when connected during start).
All results are available at: https://bugzilla.kernel.org/show_bug.cgi?id=42844 (I reported it as a problem which may be associated not with USB, but with ACPI subsystem.)
I'd appreciate any suggestions regarding further debugging of this problem.
--
Regards,
Wojtek Zabołotny
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