[ltp] Success on suspend for ThinkPad T23!!! - Kernel 2.6.10 and more so 2.6.11 rocks the house

[Martin Steigerwald]

Hello,

I now compiled a kernel 2.6.10 and then a kernel 2.6.11 from kernel.org 
based on the config file from Michael Perry. Thanks Michael for your 
help. 

I enabled suspend to disk, isdn4linux with AVM and Teles PCMCIA cards, 
XFS, cpu frequency scaling, UDF filesystem, framebuffer console support 
and some other goodies. But this time I didn't insist on building an 
initrd image, but compiled everything required to boot statically.

I applied ACPI patches from 2004-03-09.

Well and it works. More than ever:

1) suspend to ram works

2) suspend to disks works finally. Michael, this was not enabled in your 
config file. I enabled it. 

3) there is no clock drift with 2.6.11, but there is clock drift with 
2.6.10 even when CONFIG_X86_PM_TIMER is set. Hmmm, I have 
CONFIG_X86_PM_TIMER=y also for the 2.6.11 image. I think I will try with 
setting it to no in the next days.

4) my Mercury PCMCIA USB 2.0 (NEC chipset) controller works properly after 
suspend

BTW I used KDE laptop daemon stuff in the kicker bar to initiate the 
actual suspend process. I did not fiddle with ACPI suspend scripts yet. 

Here is still some things that do not yet fully work:

1) ALSA sound is quiet after suspend. "/etc/init.d/alsa restart" restores 
it so that I can hear it again. Michael, you told me it works out of the 
box after suspend on your setup, didn't you? I wonder what might be the 
difference.

2) The AVM Fritzcard A1 PCMCIA does not work after suspend. Pulling it out 
and plugging it back in and a "/etc/init.d/isdn restart" makes it 
functional again.  (I don't use isdnutils but RedHat's GUI based 
isdn-config that Klaus Knopper ported to Knoppix.)

3) Console framebuffer support doesn't survive a suspend. When I switch to 
console after suspend I get graphics garbage. I can not see a cursor or 
any text. Omitting the "vga=" parameter from GRUB and thus using standard 
console does work however.

Issue 1 and 2 should be solvable by the right ACPI scripts (that hopefully 
integrate well with KDE's ACPI support). Issue 3 isn't that important to 
me.

Well I am quite satisfied. 

Next thing would be to try with 2.6.11.2 or whatever is the most recent 
stable patch for 2.6.11 beginning of next week. And reporting the 
remaining problems to bugzilla at kernel.org or ACPI at sourceforge.net

Thanks for all the help. At last I got it working! I am willing to 
document what I did and post my kernel config file to the ThinkPad wiki 
as soon as I find time. 

For anyone who wants a copy of my kernel config file that is based on 
Michael's one in the mean time please just drop me a note. 

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