[ltp] Suspend on IBM ThinkPad T23

[Martin Steigerwald]

Hello,

I am finally trying harder (;-) to get suspend to work properly on my IBM 
ThinkPad T23, BIOS-Version 1AET61WW (1.17) under Debian Linux 2.6.10.

After various tries with standard debian kernel packages with 2.6.10 and 
some 2.6.6 oder 2.6.7 version with somewhat working suspend to ram but no 
ALSA sound after resume. 2.6.8 without working suspend-to-ram and 2.6.9 
which doesnt boot at all on my laptop I decided to build my own kernel 
and try it with that. Especially since I heard on debian-laptop ml that 
this works.

Well these are my experiences with my first try.

Any hints?

Any IBM ThinkPad T23 users with working suspend stuff here? Michael Perry 
told me so.

I'd like to have:
- suspend-to-ram (if it doesnt work probably suspend-to-disk will have to 
do)
- suspend-to-disk (either software suspend 1 or 2, whichever works better)
- working ALSA sound after resume
- ideally working ISDN card after resume

My next try will be software suspend 2 with kernel 2.6.9 (which shouldn't 
have that clock to fast problem). And I will try Michael Perry's kernel 
config, maybe initrd and default debian config + added software suspend 
isn't working that good.

----------  Weitergeleitete Nachricht  ----------

Subject: whole lot of ACPI problems with self compiled kernel
Date: Samstag, 22. Januar 2005 09:01
From: Martin Steigerwald <Martin@lichtvoll.de>
To: debian-laptop@lists.debian.org

Hello,

I now compiled an own kernel. I used unmodified kernel.org sources for
2.6.10 together with the config file from the Debian 2.6.10 kernel. I
just added SOFTWARE_SUSPEND=y to also get suspend-to-disk.

I made it as a initrd kernel just like the debian packaged kernel. I
 added "xfs" to /etc/mkinitrd/modules so that it will mount my mount
 filesystem. I also made the initrd and re-run update-grub.

So well I can boot the thing, but

1) ALSA sound still does not work after suspend

2) suspend-to-disk doesn't work at all. I get

"swsusp: FATAL: cannot find swap device, try swapon -a"

I added "resume=/dev/hda7" to kopt in GRUBs menu.list and re-run
update-modules. I checked that the swap partition is active as well.
"free" showed swap memory. I even did "swapoff /dev/hda7",
"mkswap /dev/hda7" (which created a new style V1 swap partition) and
"swapon /dev/hda7" but this didnt help.

One option will be to add /dev/hda7 to the kernel configuration. I
 thought a resume= parameter would be enough, but maybe it doesn't work
 in my case.

3) my AVM PCMCIA Fritzcard ISDN doesn't seem to work after suspend
anymore. I cannot go online after suspending. Even when I do
"/etc/init.d/pcmcia stop" and "/etc/init.d/pcmcia start" it won't work
but that doesn't surprise me a lot, since I never was able to unload the
ISDN driver modules once they were loaded. I am currently using
isdn4linux emulation layer since Knoppix Red Hat ISDN config works with
it properly. Anyone experience whether the CAPI driver stuff works with
suspend?

4) During suspend-to-ram time goes considerably too fast. This was
reported for the Debian kernel, but it seems to be true for the generic
kernel as well.

Next thing will be trying with software suspend 2 patches. A guy from
 this mailing list told me that this solved his ALSA not working after
 suspend issues on a Dell laptop.

Maybe it also has to do with the default Debian kernel configuration or
initrd. Well I don't need initrd so if it causes problems I go without
it.

I hope some day this will work as described on the ACPI homepage:
transparently (without a need for end user support).

Regards
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de

-------------------------------------------------------

Regards,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de