Would you mind opening a report at https://bugzilla.kernel.org? I'm not sure if anybody will be able to do anything about this, but it's always possible.
Submitted now, https://bugzilla.kernel.org/show_bug.cgi?id=201503
A complete dmesg log and "sudo lspci -vv" output from a successful boot would be a good start. And if you have a screenshot of the failure, that would help, too. You can use the "ignore_loglevel" kernel parameter to make sure we see everything on the console.
Added.
Does this machine have an iLO? If so, it may have logs that could be useful if this is related to some sort of bus error.
Nothing in the ILO logs. -- Meelis Roos <mroos@xxxxxxxx>
