[Pkg-xen-devel] Bug#782383: Panic: "System without CMOS RTC must be booted from EFI" i.c.w. HP servers
Hans van Kranenburg
hans.van.kranenburg at mendix.com
Sat Apr 11 12:17:19 UTC 2015
Package: xen-hypervisor-4.4-amd64
Version: 4.4.1-8
Severity: normal
Tags: patch
The Xen hypervisor in Debian Jessie does not boot on recent HP server
hardware (e.g. the current dl360 gen9 series) when using normal "legacy"
boot.
During boot, it panics with the message "System without CMOS RTC must be
booted from EFI".
This message was introduced in upstream commit f745566, "x86: honor ACPI
indicating absence of CMOS RTC". After reports that this breaks booting
on HP servers, because the hardware incorrectly sets the CMOS RTC Not
Present flag, a workaround was made in e9425f05, "x86/ACPI: allow CMOS
RTC use even when ACPI says there is none".
The Xen version that the debian packages are based on is created from a
release in between these two commits.
For our own use, I rebuilt the packages including a patch that reverts
f745566, instead of applying the solution in e9425f05, because that
solution already depends on other new commits.
Please consider doing a similar thing in the Debian packages for Jessie,
as it will help to prevent scaring people away from choosing Debian to
run Xen on their servers for the next few years. :-)
The simple revert-patch I'm using is attached.
Thanks,
--
Hans van Kranenburg - System / Network Engineer
T +31 (0)10 2760434 | hans.van.kranenburg at mendix.com | www.mendix.com
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