[ltp] Re: suspend/resume & sound on A22p

[Tod Harter]

Well, apmd really just responds to APM bios notifications. If there's nothing 
in particular you NEED to do during suspend/resume then naturally you can get 
away without needing to run it.

I'm running kernel 2.4.9 on an A20p with Mandrake 8 and suspend also works 
fine for me, and it resumes with no problem either, but I did have to do a 
few kernel compiles with different APM options. It seems on the A20 at least 
that you have to select option to use a real mode bios call to shut the 
machine down, otherwise it would sporadically hang during the transition to 
run level 6 (shut down). There are some options in there dealing with resume 
as well, take a look at them and give various ones a try. 

I also found that with KDE you can set it to go to "Susped" mode fine, but if 
you set it to put your machine in "Standby" then X becomes pretty much 
completely trashed when it resumes. Since the terminology between the kernel, 
the APM bios, and KDE don't seem to be totally consistent about what the 
different states are called I'm not 100% certain if that has anything to do 
with your problem, but it is known that XFree86 doesn't necessarily properly 
recover from a full sleep. I imagine its an issue with driver support for 
properly bringing the hardware back online or an interrupt handling issue or 
something like that. 

On Thursday 23 August 2001 04:45, you wrote:
> >>>>> "l" == linux-thinkpad  <linux-thinkpad@merctech.com> writes:
>
>     l> I'm setting up Linux (RH 7.1, kernel 2.4.5) on a ThinkPad A22p, and
> I've got a l> couple of issues with the APM suspend/resume and sound:
>
>     l> 	the machine "suspends" fine, but it doesn't resume completely--
>     l> 	after a suspend, the LCD backlight will come on, and the hard drive
>     l> 	will power up, but there's no keyboard response, no display, no
>     l> 	ability to switch to a virtual console
>
>     l> 	sound works...but it seems to depend upon either the KDE "artsd"
> daemon l> 	running or having a mixer application running
>
>
>     l> Any suggestions? I'm particularly interested in kernel config files
> and any l> modifications to /etc/sysconfig/apmd and
> /etc/sysconfig/apm-scripts to get the l> suspend/resume working correctly.
>
> Don't know whether this will help or not (since I've only tried it on
> a T21 and a Ti1460), with newer versions of pcmcia-cs and XFree86 I
> found that I don't actually need apmd at all---I disabled it and
> resume/suspend has been working just fine.

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