2.6.21.1 fails to suspend/resume to disk (sort of)

[Romano Giannetti <romano.giannetti@gmail.com>]

Hi, 

I am trying to upgrade from my ubuntu kernel 2.6.17.3 to 2.6.21.1 and I
have quite a bunch of problems with suspend/resume, both to disk and to
ram. I have reported the s2ram problem in a separate message (search for
a follow-up to the thread with subject "[patch 00/69] -stable review".
http://lkml.org/lkml/2007/5/23/38

Now for the suspend to disk. With default setting (/sys/power/disk ==
platform) my laptop (vaio PGC-FX701) fails to poweroff; it stays with
backlight on, a white screen, and if I power it off manually afterward
it did not resume.

By doing echo shutdown > /sys/power/disk the laptop *do* power off (it's
very slow, but I think that's related with the 60 secs delay commented
in the other post). Then it resume --- text console did resume ok ---
but the virtual console with X do not come back. I had to do a
ctrl-alt-backspace thing. 

Any hints? More data?

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