resume sometimes reboots or freezes Laptop, trying to debug

resume sometimes reboots or freezes Laptop, trying to debug

[Sascha Heid]

Hello List!

I have a pretty new Laptop with the following specs:

Lenovo X60T (Tablet)
Core Duo
SATA
Intel GMA Videocard
Gentoo-Linux running Kernel 2.6.20

The issue is that about 1 of 10 resumes from RAM do not work by either
the Laptop rebooting or freezing.
What makes it more frustrating is that it is completely unpredictable
for me, sometimes i can resume 30 times in a row and when i start
working on something it will crash on the next resume.

After trying different kernels and configurations im now down to a
kernel with APIC and prefetching disabled and only 1 module in use
(WLAN).
I also tried both the suspend2ram that comes with the kernel and s2ram
from suspend.sf.net, the result being the same.

I have pm-debugging and tracing enabled in the kernel but thats where im stuck.

Most of the times i get something like this:

 Magic number: 0:351:236
 hash matches device ttyv6

with various terminals

and sometimes this

 Magic number: 0:798:378
 hash matches drivers/base/power/resume.c:46

(no further line mentioning any device here)

To suspend the laptop i run this:

chvt 1
echo 1 > /sys/power/pm_trace
#/home/sascha/suspend-0.5/s2ram -f -a3
echo mem > /sys/power/state
setserial /dev/ttyS0 port 0x0200 irq 5 autoconfig
chvt 7

I found 1 other Linux-user with a X60T that has the same (or more)
suspend/resume issues using standard ubuntu and suse configurations.

If anyone has any idea or advice i would appreciate it very much.

Greetings from Germany
Sascha

Re: resume sometimes reboots or freezes Laptop, trying to debug

[Rafael J. Wysocki]

On Sunday, 8 April 2007 02:21, Sascha Heid wrote:
> Hello List!
> 
> I have a pretty new Laptop with the following specs:
> 
> Lenovo X60T (Tablet)
> Core Duo
> SATA
> Intel GMA Videocard
> Gentoo-Linux running Kernel 2.6.20
> 
> The issue is that about 1 of 10 resumes from RAM do not work by either
> the Laptop rebooting or freezing.
> What makes it more frustrating is that it is completely unpredictable
> for me, sometimes i can resume 30 times in a row and when i start
> working on something it will crash on the next resume.
> 
> After trying different kernels and configurations im now down to a
> kernel with APIC and prefetching disabled and only 1 module in use
> (WLAN).
> I also tried both the suspend2ram that comes with the kernel and s2ram
> from suspend.sf.net, the result being the same.
> 
> I have pm-debugging and tracing enabled in the kernel but thats where im stuck.
> 
> Most of the times i get something like this:
> 
>  Magic number: 0:351:236
>  hash matches device ttyv6
> 
> with various terminals
> 
> and sometimes this
> 
>  Magic number: 0:798:378
>  hash matches drivers/base/power/resume.c:46
> 
> (no further line mentioning any device here)
> 
> To suspend the laptop i run this:
> 
> chvt 1
> echo 1 > /sys/power/pm_trace
> #/home/sascha/suspend-0.5/s2ram -f -a3
> echo mem > /sys/power/state
> setserial /dev/ttyS0 port 0x0200 irq 5 autoconfig
> chvt 7
> 
> I found 1 other Linux-user with a X60T that has the same (or more)
> suspend/resume issues using standard ubuntu and suse configurations.
> 
> If anyone has any idea or advice i would appreciate it very much.

Please try 2.6.21-rc6.  If it doesn't work, please file a bug report at bugzilla.kernel.org .

Greetings,
Rafael

Re: resume sometimes reboots or freezes Laptop, trying to debug

[Sascha Heid]

> Please try 2.6.21-rc6.  If it doesn't work, please file a bug report at >bugzilla.kernel.org .

I just got my first frozen resume with 2.6.21rc6 and got nothing but
this one line:
Magic number: 0:692:668

I had other problems additionally, Xorg crashed twice on the resume
and once it showed me funny ascii-art instead of my X Session.

Regarding a bug-report, i dont think anybody would care about such a
rare problem and on a rc-kernel.
What information could i supply anyways? Not much.

Looks like alot of acpi work is been done though, maybe in 2.6.22...