[ltp] APM suspend-to-ram stopped working on T40

[Erik Iverson]

Hello All,

I have a T40 running RH9.  APM (via bios) originally worked perfectly, 
both suspend-to-ram and suspend-to-disk.  After I had the machine for 
about 4 months, using suspend-to-ram at least 2-3 times per week, all 
of a sudden it stopped working - now, when I suspend to ram, it 
suspends and wakes back up within about 10 seconds.   Same behavior if 
I enter the command "apm -s" or Fn-F4, X-display or console. 
 Suspend-to-disk still works fine.  

Going back through the logs at the time of the change, no packages were 
installed during the time-frame.  I was working on some display/X/gdm 
stuff at about that time, however.  The changed behavior has persisted 
through multiple kernel upgrades and an EC/BIOS upgrade.  

I'm running the Emperor Linux 2.4.24 kernel (yes, the machine is the 
Emperor Linux Toucan).  The behavior is the same with or without apmd 
running.  

I don't think it's a hardware issue, as suspend-to-ram still works 
perfectly if I reboot into Windows XP (fortunately, I hadn't gotten 
around to deleting the partition yet).  However, I get the same 
immediate wakeup if I boot into a stock original RH9 rather than the 
Emperor Linux, if I boot from Tom's Root Boot, or if I boot from 
Knoppix. 

acpi is disabled in the kernel call.  

I admit it - this has me stumped.  All of the things we've tried (I and 
Emperor Tech Support) have done nothing.  As anybody seen anything like 
this before?

Erik Iverson
eiverson@ornl.gov