Precision 490 Reboot Hang

[Thomas J. Baker]

I've got a Precision 490 that hangs at reboot unless I use reboot=bios
on the kernel command line. A bug filed against the kernel should
include what other information?

Thanks,

tjb
-- 
=======================================================================
| Thomas Baker                                  email: tjb(a)unh.edu    |
| Systems Programmer                                                  |
| Research Computing Center                     voice: [phone] |
| University of New Hampshire                     fax: [phone] |
| 332 Morse Hall                                                      |
| Durham, NH 03824 USA              http://wintermute.sr.unh.edu/~tjb |
=======================================================================

[Dave Jones]

On Thu, Dec 06, 2007 at 04:33:56PM -0500, Thomas J. Baker wrote:
>  
>  I've got a Precision 490 that hangs at reboot unless I use reboot=bios
>  on the kernel command line. A bug filed against the kernel should
>  include what other information? 
dmidecode output.

	Dave 

-- 
http://www.codemonkey.org.uk

[Jarod Wilson]

Thomas J. Baker wrote:
>  I've got a Precision 490 that hangs at reboot unless I use
> reboot=bios
>  on the kernel command line. A bug filed against the kernel should
>  include what other information? 
I might suggest looking for a BIOS update and/or downgrade before you
file any bugs. I've got a Precision 490 here that reboots just peachy.
Dell actually has bios updates that can be done from Linux on these boxes.

-- 
Jarod Wilson
jwilson(a)redhat.com

[Thomas J. Baker]

On Thu, 2007-12-06 at 16:47 -0500, Jarod Wilson wrote:
>  Thomas J. Baker wrote:
>  > I've got a Precision 490 that hangs at reboot unless I use reboot=bios
>  > on the kernel command line. A bug filed against the kernel should
>  > include what other information?
>  
>  I might suggest looking for a BIOS update and/or downgrade before you
>  file any bugs. I've got a Precision 490 here that reboots just peachy.
>  Dell actually has bios updates that can be done from Linux on these boxes.
>   
I'm running the latest BIOS as it was shipped with the machine. I'd
rather use reboot=bios than run an old BIOS.

Thanks,

tjb
-- 
=======================================================================
| Thomas Baker                                  email: tjb(a)unh.edu    |
| Systems Programmer                                                  |
| Research Computing Center                     voice: [phone] |
| University of New Hampshire                     fax: [phone] |
| 332 Morse Hall                                                      |
| Durham, NH 03824 USA              http://wintermute.sr.unh.edu/~tjb |
=======================================================================

[Jarod Wilson]

Thomas J. Baker wrote:
>  On Thu, 2007-12-06 at 16:47 -0500, Jarod Wilson wrote:
> > Thomas J. Baker wrote:
> >> I've got a Precision 490 that hangs at reboot unless I use reboot=bios
> >> on the kernel command line. A bug filed against the kernel should
> >> include what other information?
> > I might suggest looking for a BIOS update and/or downgrade before you
> > file any bugs. I've got a Precision 490 here that reboots just peachy.
> > Dell actually has bios updates that can be done from Linux on these boxes.
> >
>  
>  I'm running the latest BIOS as it was shipped with the machine. I'd
>  rather use reboot=bios than run an old BIOS. 
Sorry, I was suggesting it more as a "see if this is a bios issue and
not a kernel issue" than "fix it by running an old bios". Did you see
Roland's note about his own 490? He said his only fails to reboot when
running an i386 kernel, but works fine w/an x86_64 kernel, which doesn't
conflict with what I've seen, since mine's also running an x86_64
kernel. He also mentioned that this started sometime between 2.6.22 and
2.6.23. If you are indeed running a 32-bit kernel, it sounds like an
i686-specific kernel bug.

-- 
Jarod Wilson
jwilson(a)redhat.com

[Thomas J. Baker]

On Fri, 2007-12-07 at 09:35 -0500, Jarod Wilson wrote:
>  Thomas J. Baker wrote:
>  > On Thu, 2007-12-06 at 16:47 -0500, Jarod Wilson wrote:
>  >> Thomas J. Baker wrote:
>  >>> I've got a Precision 490 that hangs at reboot unless I use reboot=bios
>  >>> on the kernel command line. A bug filed against the kernel should
>  >>> include what other information?
>  >> I might suggest looking for a BIOS update and/or downgrade before you
>  >> file any bugs. I've got a Precision 490 here that reboots just peachy.
>  >> Dell actually has bios updates that can be done from Linux on these boxes.
>  >>
>  > 
>  > I'm running the latest BIOS as it was shipped with the machine. I'd
>  > rather use reboot=bios than run an old BIOS.
>  
>  Sorry, I was suggesting it more as a "see if this is a bios issue and
>  not a kernel issue" than "fix it by running an old bios". Did you see
>  Roland's note about his own 490? He said his only fails to reboot when
>  running an i386 kernel, but works fine w/an x86_64 kernel, which doesn't
>  conflict with what I've seen, since mine's also running an x86_64
>  kernel. He also mentioned that this started sometime between 2.6.22 and
>  2.6.23. If you are indeed running a 32-bit kernel, it sounds like an
>  i686-specific kernel bug.
>   
Yes, I did and I should have added that the system has an i386 F8
installation so it does look to be an i686 kernel problem. I don't
really want to run an x86_64 kernel on this system as the eventual user
doesn't really have a need for it. I'll update the bug. He also said A04
had the same problem so it would seem A05 probably wouldn't help much.

Thanks,

tjb
--
=======================================================================
| Thomas Baker                                  email: tjb(a)unh.edu    |
| Systems Programmer                                                  |
| Research Computing Center                     voice: [phone] |
| University of New Hampshire                     fax: [phone] |
| 332 Morse Hall                                                      |
| Durham, NH 03824 USA              http://wintermute.sr.unh.edu/~tjb |
=======================================================================

[Roland McGrath]

I've had the same problem and not gotten around to reporting it.  I hadn't
tried reboot=bios.  For me, x86_64 kernels reboot fine but i386 kernels
hang at reboot, on the same machine.  Mine has BIOS version A06, and
behaved the same with A04 before upgrading.  This started in upstream
kernels between 2.6.22 and 2.6.23 IIRC, and Fedora kernels since 2.6.23
behave the same as my hand-built upstream kernels.

Sometimes sysrq-b works on a boot where formal reboot hangs, though once in
a while it hangs at sysrq-b too.

Possibly relevant, boot messages include:

	ACPI: System BIOS is requesting _OSI(Linux)
	ACPI: If "acpi_osi=Linux" works better,
	Please send dmidecode to linux-acpi(a)vger.kernel.org

I haven't tried any acpi*= or reboot= kernel options.


Thanks,
Roland