[ltp] SOLVED (sort of) ACPI or APM on a thinkpad R52

[Michael R. Hines]

After a lot of pain and heartache, I did finally get my R52 to sleep.

1. Read these wikis:
    http://thinkwiki.org/wiki/How_to_configure_acpid
    
http://thinkwiki.org/wiki/Problem_with_display_remaining_black_after_resume
    
http://www.thinkwiki.org/wiki/Problems_with_SATA_and_Linux#Hang_on_resume_from_suspend_to_RAM

2.
- Try turning off things like DRI in xorg.conf and DRM in your kernel's 
character devices.
- Don't compile in selinux (acpi tries to unsuccessfully stop the audit 
daemon)

3. Understand what's going on at the main ACPI website:
    http://acpi.sourceforge.net/documentation/sleep.html

Thanks again to Wolfang for resuggesting that I try the third patch.

- michael

Wolfgang Karall wrote:

>On Sun, 2005-11-06 at 12:50 -0500, Michael R. Hines wrote:
>  
>
>>I used "echo -n mem > /sys/power/state". Is that consistent with your usage?
>>    
>>
>
>That's probably not enough, since a couple of kernel modules (e.g. USB)
>tend to get into the way at suspend time, or the screen stays garbled at
>time. There is a example script at
>http://thinkwiki.org/wiki/How_to_configure_acpid that you might extend
>to your needs.
>
>BTW, I'm still using "echo -n 3 > /proc/acpi/sleep" via the
>hibernate.conf settings, but I have to confess that I haven't tried
>the /sys/power/state way in a while.
>
>Otherwise suspend to RAM works very reliable for me, not a single crash
>with kernel 2.6.14 and the 3rd patch from the Wiki.
>
>Regards
>WK
>  
>