Re: Resume from mem state == Reboot (Averatec)

[Jason Dagit <dagit-LP0vGzdgvNwj5TC/SZClsA@public.gmane.org>]

Jason Dagit <dagit-LP0vGzdgvNwj5TC/SZClsA@public.gmane.org> writes:

> Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org> writes:
>
>> This is likely to be the same problem as
>> http://bugzilla.kernel.org/show_bug.cgi?id=3691

I made a discovery today.  This bug says the following:
http://bugme.osdl.org/show_bug.cgi?id=3586

---- Begin Paste ----
Code from arch/i386/kernel/acpi/wakeup.S:
[...]
        mov     $(wakeup_stack - wakeup_code), %sp              # Private stack is needed for ASUS board
        movw    $0x0e00 + 'S', %fs:(0x12)

        pushl   $0      ###THIS LINE CAUSES REBOOT!             # Kill any dangerous flags
        popfl

        movl    real_magic - wakeup_code, %eax
[...]

Commenting out pushl $0 and popfl wakeup code goes on until another
issue blocks it later (more on this to be added as soon as we point
something out on the acpi-devel mailing list)
---- End Paste ----

I tried commenting out those lines (both the pushl and popfl) and my
laptop suspends and resumes!  The screen is blank when the machine
resumes, but I can toggle capslock and if I type "find /" the hard
drive light comes on.  So it would appear that the machine is setting
the firmware_wake_vector correctly, but something about that push and
pop is not good for this machine.  Now I'm off to debug the video
resume problems, which appears to be a pretty common problem with
suspend/resume.

I hope this is helpful to others.  Matthew can you try this on your
laptop?

Thanks,
Jason


-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click