Hello all,

I'm in the process of debugging S3 on my notebook and found out that I
can resume from S3 with every kernel up to (and including) 2.6.7-rc1
( patch-2.6.6-bk8-bk9.bz2 ).

After 2.6.7-rc1, my notebook freezes upon a resume from S3. Tested with
2.6.7-rc2, -rc3, 2.6.8.1, 2.6.9 and some 2.6.10-rcX-bkX kernels.

Please note that these tests were run in single user mode with a
barebone kernel
.config (attached) just enough to boot (ie no modules, no usb etc)

I have found a hint on the web that the pci-resume code, which was
included in 2.6.7-rc2, might cause this problem. I removed the call to
pci_default_resume in drivers/pci/pci-driver.c and my laptop resumed
into a working state again ( tested
with 2.6.7 and 2.6.9 ).

I've written an email to Arjan van de Ven, the author of the resume
patch and he suggested positing here, along with a full lspci output
(attached)
He thinks that some device is misbehaving and causing trouble if
resumed.

I have the bad feeling that the device in question is the built-in video
card
"ATI Technologies Inc RV250 5c63 [Radeon Mobility 9200 M9+] (rev 01)"
since every try to re-enable it after a resume failed. The screen just
stays dark, even with acpi_sleep=s3_mode. s3_bios freezes the machine on
a resume, as does resuming with radeonfb or accelerated X (DRI or
fglrx). Not even the boot-radeon tool
helps. It either freezes the machine, or just doesn't work.

In the meantime, I'm using the attached patch which disables the new
pci-resume code.

Thanks
-- 
Matthias Hentges 
Cologne / Germany

[www.hentges.net] -> PGP welcome, HTML tolerated
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My OS: Debian SID. Geek by Nature, Linux by Choice