Re: S3/S4 doesn't work, no-one cares, it's a mess Re: ACPI S3 wake howto was: RE: [BKPATCH] ACPI for 2.6

[Luca Capello <luca-wlebWZzHoyE@public.gmane.org>]

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Hello,

on 03/31/04 12:58, Micha Feigin wrote:
> The problem with 2.6 is that the power management (PM) code is only
> partly implemented. It doesn't exist at all for agp and dri AFAIK it
> doesn't exist for usb and is partial for the rest of the
> stuff. Probably months before it will be fixed and if you want to hack
> into things that is the first place to start in order to try and get
> things working.
IMHO this is wrong for different reasons:

1) the latest AGP and DRI driver for my ATI Radeon Mobility NP M10/9600 works
   great on my ASUS M6842NWH (Centrino) at least for S1 [1] (I haven't had
   time to test S3/S4 yet), so this means that there's PM support for some
   AGP/DRI drivers... BTW, to answer Huw about ATI drivers, I use the
   *open-source* DRI ones [2] and they work perfect but 3D/OpenGL (which I don't
   use as I don't have time to play): I can have dual-head (LCD 1400x1050 and
   CRT 1600x1200), clone mode, Xinerama or MergedFB and DVD full screen...

2) the same new 2.6 'radeonfb' driver has PM implementations, even if it needs
   more work, as reported in this list ([3] and [4])

3) USB *has* working PM support at least in 2.6.5-rc2 [5] (search for
   "[PATCH] USB: Enable interrupts in UHCI after PM resume")

4) AFAIK some ALSA driver can suspend/resume [6]

5) I don't know a lot about network driver, but I know of PM implementations [7]
   on 'e1000' and 'ipw2100' drivers and during my tests, I never remove the
   'bcm5700' module (and this doens't cause any resuming problem)

Thx, bye,
Gismo / Luca

=====
References:
1- http://marc.theaimsgroup.com/?l=acpi4linux&m=107989959514312&w=2
2- http://dri.sourceforge.net/cgi-bin/moin.cgi/ATIRadeon
3- http://marc.theaimsgroup.com/?l=acpi4linux&m=107731507729859&w=2
4- http://marc.theaimsgroup.com/?l=acpi4linux&m=107752252801966&w=2
5- ftp://ftp.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.5-rc2
6- http://sourceforge.net/mailarchive/forum.php?thread_id=4107033&forum_id=1752
7- http://sourceforge.net/mailarchive/forum.php?thread_id=4075032&forum_id=38938
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