Hi Bill, i run into to same problem on a Dell Optiplex 780. This was running with Debian and Xen since 2011 without any trouble on that box. After upgrade to Debian 9, xen 4.8 wont start anymore. But i can start Debian 9 without xen on the box.
I saw you are running on a Dell R610 with bios 6.4.0. This is the latest bios for your box. I am currently pretty sure, i'm not running the latest bios on my box. The question would be, what setting would be wrong, if it depends on bios. For testing i have some Dell T710, i will try this week to find out more. Unfortunatly i have already deleted Xen 4.4 from Debian 8 from my box. best regards Thomas > Von: "thomas stegbauer" <thomas.stegba...@stegbauer.info> > An: "866952" <866...@bugs.debian.org> > Gesendet: Dienstag, 4. Juli 2017 23:39:33 > Betreff: debian with xen upgraded from deb8 to deb9 on Dell Optiplex 780 > crashed > too > hi, > i upgraded my testsystem running on a Dell Optiplex 780 fine for the last five > years from Debian 8 to Debian 9. > It also crashes on boot, after > complaining abount an errer for the mcelog (-16) > mounting the root partition (/dev/md0) > loading parport driver (?) > afterwards my monitor is out of frequency > was not able to run further tests right now. > best regards > Thomas