Hi again,

Navin found a workaround: acpi=noirq (and pci=noacpi) lets me boot with
the newer kernels.

Attached are dmesg's from 4.7rc2 and 4.7rc5 from
http://kernel.ubuntu.com/~kernel-ppa/mainline/ (rc5 complained about
missing noveau firmware; I haven't tried the newest linux-firmware
package yet, but haven't yet seen anything *not* working in rc5 that was
working in rc2).


Other changes when using acpi=noirq that may or may not be relevant:
The computer will now poweroff when I do a shutdown, and restarts
correctly (it used to just "hang" at the end of the shutdown sequence),
and a bluetooth device shows up that I didn't know I had. However,
although I seem to be able to suspend, I can't resume (no response when
hitting power button). All in all an improvement though …



best regards,
Kevin Brubeck Unhammer