Kevin, I mentioned in a response to the "Re: [SeaBIOS] usb-msc.c: TEST_UNIT_READY needs USB_DIR_OUT?" email thread that when I applied the patches related to that thread the Ubuntu booting issue that I see in this thread actually increases the passing rate from ~0% to ~50%. Perhaps setting the DIR bit twice will solve my problem :)
I also was wondering if you could point me to the code that you referred to when you wrote ... "I did see what appears to be a race with USB "interrupt" pipe reading" ? thanks in advance, Dave > > > > The failure occurs when the system boots up to the GRUB menu. If I > > let the menu timeout it will boot the default option which is > > Ubuntu. If I hit the <Enter> key the system will lock-up with no > > output on the debug COM port. If at the GRUB menu and I <down > > arrow> > > to the memtest86 option, it will sometimes work and sometimes > > lockup. > > In the processes of looking through the OHCI code, I did see what > appears to be a race with USB "interrupt" pipe reading. The code is > assuming the TD is complete when the ED acknowledges the change, but > the spec is pretty clear that the TD can be modified after the ED is > updated. However, I'd be quite surprised that such a small race > would > lead to reproducible failures. I also don't see how it would relate > to EHCI thumbdrive usage. > > -Kevin > _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios