https://bugzilla.kernel.org/show_bug.cgi?id=42700
Summary: Kernel won't boot on D102GCC2 board unless ACPI=off
Product: ACPI
Version: 2.5
Kernel Version: 3.*
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
AssignedTo: acpi_acpica-c...@kernel-bugs.osdl.org
ReportedBy: kernel-b...@whamra.com
Regression: Yes
this is a kubuntu 32-bit system.
in kubuntu 11.04, they were using the 2.6 kernel still, and the system was
booting fine, up to the last kernel tried on that release:
willy@Hamra:~$ uname -r
2.6.38-12-generic
after upgrade to 11.10, ubuntu started using the 3.0 kernel, which won't boot
on this board, unless ACPI=off was specified. but this, of course, removes all
ACPI functionality, and disables hyper threading, effectively halving the
processing power.
kernels tried as shipped by ubuntu:
willy@Hamra:~$ ls -1 /boot/vmlinuz-3.0*
/boot/vmlinuz-3.0.0-13-generic
/boot/vmlinuz-3.0.0-14-generic
/boot/vmlinuz-3.0.0-15-generic
/boot/vmlinuz-3.0.0-16-generic
so i tried compiling a linux kernel from last month's 3.1 tree, to check if
this is an ubuntu issue or a kernel issue. i used very close values to what i
would normally use on my LinuxFromScratch and ended with same bug. then i
brought the config of the 2.6.38-12-generic kernel provided by ubuntu, and used
it as starting point for configuring the 3.1 kernel. i just ran the
configuration program so it can remove obsolete options, and add necessary new
ones, didnt modify anything myself, and compiled, again, same result, system
won't boot.
the stage of booting at which this issue happens is after these lines in the
boot process:
[ 0.285128] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.285432] input: Power Button as
/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input0
[ 0.285443] ACPI: Power Button [PWRB]
[ 0.285571] input: Power Button as
/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
[ 0.285579] ACPI: Power Button [PWRF]
after the last PWRF line the system just hangs. no panic, no flashing keyboard
LEDs, and no response at all. judging by the speed of fans, it doesnt seem the
processor is stuck in an intensive infinite loop either.
normally, on a 2.6 kernel, the lines following these are:
[ 0.285849] ACPI: acpi_idle registered with cpuidle
[ 0.287994] ERST: Table is not found!
[ 0.288199] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[ 0.292073] isapnp: Scanning for PnP cards...
hope this is enough info to be able to debug this issue. a launchpad bug report
has been filed as well:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/883441
thanks in advance
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