Experiences with new PCI code

Kevin Oberman oberman at es.net
Tue Apr 13 14:34:02 PDT 2004

System: IBM T30 (ICH3, 1.8G P4-M, 512 MB RAM, Intel/Xircom Pro/100 VE
Ethernet, TI1520 CardBus bridge, Prism 2.5 wireless, Analog Devices
AD1881A AC97 codec)

After the integration of the new PCI code the suspend/resume behavior is
very different than before.

- Display backlight still turns on and remains on upon suspend. Video
  does not blank, but loses power so display "rots" over a period of at
  least minutes. (This is unchanged.) hw.acpi.video show correct values,
  but fails to change them. DPMS blanking does blank the display but
  does not turn off back-light.

- hw.acpi.sleep_delay is now ignored, but the disk no longer does an
  instant shutdown without flushing cache, so this is OK.

- Suspend LED turns on. (Unchanged.)

- I stop receiving interrupts on irq11 which handles much of my
  system. This includes sound, CardBus, USB and network. This is the
  big issue as the machine is now pretty useless.

Unfortunately, this loss of irq11 makes further testing almost
impossible. To further confuse things, interrupts continue for a
seemingly random time of up to several minutes after the restore and
then stop. This last part has me totally baffled, but maybe someone has
some idea why this is happening. Non-irq11 devices (mouse, keyboard,
clocks, ata controllers) continue to work.

Anything you would like me to try?
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634

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