[ltp] Possible solution to ACPI power drain with 2.6.10

[Bob Alexander]

Bob Alexander wrote:
> I believe I will download again the fresh kernel 2.6.10 from kernel.org 
> and try applying the patch cleanly.
> 
> I also hope that the logging will resume.
> 

Michele (and other friends helping on this),
used the pristine radeon_pm.c file and patched without problems.

With the new kernel I do not see the kern.log entries you talk about.

What I see (below) is puzzling. A bit long and my questions interspersed 
amongst the kern.log lines.

After you see this I will do more drainage calculations !

TIA,
Bob

****
**** more or less just booted
****
Jan 21 14:13:09 localhost kernel: [drm] Loading R200 Microcode
****
**** now I have pressed Fn-F4 which in my ACPI scripts does the
**** following after unloading some modules
**** logger "Fn+F4 Suspending to RAM"
**** sync
**** hwclock --systohc
**** echo -n mem > /sys/power/state
****
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.0: remove, state 1
Jan 21 14:17:08 localhost kernel: usb usb1: USB disconnect, address 1
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.0: USB bus 1 
deregistered
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.1: remove, state 1
Jan 21 14:17:08 localhost kernel: usb usb2: USB disconnect, address 1
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.1: USB bus 2 
deregistered
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.2: remove, state 1
Jan 21 14:17:08 localhost kernel: usb usb3: USB disconnect, address 1
Jan 21 14:17:08 localhost kernel: uhci_hcd 0000:00:1d.2: USB bus 3 
deregistered
Jan 21 14:17:08 localhost kernel: ehci_hcd 0000:00:1d.7: remove, state 1
Jan 21 14:17:08 localhost kernel: usb usb4: USB disconnect, address 1
Jan 21 14:17:09 localhost kernel: ehci_hcd 0000:00:1d.7: USB bus 4 
deregistered
****
**** Here is where after a short while (around 20-30 seconds)
**** I have resumed the machine
**** Please note the timestamp
**** The ACPI script upon returning from sleep does hwclock --hctosys
**** See next final comment
****
Jan 21 14:18:13 localhost kernel: Back to C!
Jan 21 14:18:13 localhost kernel: Warning: CPU frequency is 1600000, 
cpufreq assumed 600000 kHz.
Jan 21 14:18:13 localhost kernel: ACPI: PCI interrupt 0000:00:1f.1[A] -> 
GSI 11 (level, low) -> IRQ 11
Jan 21 14:18:13 localhost kernel: ACPI: PCI interrupt 0000:00:1f.5[B] -> 
GSI 11 (level, low) -> IRQ 11
Jan 21 14:18:13 localhost kernel: PCI: Setting latency timer of device 
0000:00:1f.5 to 64
Jan 21 14:18:13 localhost kernel: ACPI: PCI interrupt 0000:01:00.0[A] -> 
GSI 11 (level, low) -> IRQ 11
Jan 21 14:18:13 localhost kernel: ACPI: PCI interrupt 0000:02:01.0[A] -> 
GSI 11 (level, low) -> IRQ 11
Jan 21 14:18:13 localhost kernel: agpgart: Found an AGP 2.0 compliant 
device at 0000:00:00.0.
Jan 21 14:18:13 localhost kernel: agpgart: Putting AGP V2 device at 
0000:00:00.0 into 4x mode
Jan 21 14:18:13 localhost kernel: agpgart: Putting AGP V2 device at 
0000:01:00.0 into 4x mode
Jan 21 14:18:13 localhost kernel: [drm] Loading R200 Microcode
****
**** AND HERE VOILA' I am back at what seems about the right time
**** rest is just a few extra lines
****
Jan 21 14:17:44 localhost kernel: ACPI: PCI interrupt 0000:00:1d.7[D] -> 
GSI 11 (level, low) -> IRQ 11
Jan 21 14:17:44 localhost kernel: ehci_hcd 0000:00:1d.7: Intel Corp. 
82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller
Jan 21 14:17:44 localhost kernel: PCI: Setting latency timer of device 
0000:00:1d.7 to 64
Jan 21 14:17:44 localhost kernel: ehci_hcd 0000:00:1d.7: irq 11, pci mem 
0xc0000000