Experiences with new PCI code

M. Warner Losh imp at bsdimp.com
Tue Apr 13 19:27:30 PDT 2004

In message: <20040413220142.5F50E5D08 at ptavv.es.net>
            "Kevin Oberman" <oberman at es.net> writes:
: 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. Unfortunately, it's worse, but moving in the
: right direction.
: Suspend:
: - 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.)
: Resume:
: - 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?

While my patches will make it better, more extensive changes to the
power code will be necessary to make it work perfectly.  Nate has been
taking the lead in this area.

Why don't you try


to see if that helps any.  This will turn on more power managmenet


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