[linux-dvb] Wakeup Problem (was: Re: Video Disk Recorder version 0.94

[Usenet-372110@zocki.toppoint.de (Rainer Zocholl)]

Klaus.Schmidinger@cadsoft.de(Klaus Schmidinger)  02.09.01 17:52

Once upon a time Klaus Schmidinger shaped the electrons to say...

>The new version 0.94 of the Video Disk Recorder project
>is now available at

>    http://www.cadsoft.de/people/kls/vdr/download.htm

>- Implemented automatic shutdown (see INSTALL and MANUAL for details).

real nice feature!
Thanks a lot.


After writing a smal script and editing "runvdr"

file VDR/runvdr:
...
VDRCMD="$VDRPRG -w 60 -s ./pwroff $*"
...


file VDR/pwroff:
#!/bin/sh
# setRTCwakeup $(($1 - 300))
logger VDR shutdown 1:$1 2:$2 
sync
/sbin/poweroff


the machine beautifully shuts down.



But:
How to wake up?

Tried a hacked rtctest, the apmsleep (out of apm 3.0) 
to enter a alarm time, but with little sucess.
rtctest runs, and the interrupt occurs (see below).

The BIOS (AMI MS-6351 V1.4 of MSI MS-6215 LAN-PC) 
knows a Alarm Clock wait up.
This works flawlessly, when set im BIOS.

The i815-Chipset (ICH 82801AA) of the MS-6351 mobo has 
an "enhanced RTC" which allows alarms 30 days in future, 
not just everyday as the MC146818A did.
Setting the Alarm Date day to "Every day" is required
to make rtctest run at all, because the current rtc-driver do not
set/touch the "Date Alarm". The "date alarm" value is located 
in the former "spare" bit 5..0 of REG D. Else the day the BIOS 
set remain in the bits, cause a delay of several days...so 
rtctest seems to hang.



The BIOS overwrites the RTC-Alarm register when APM "powers down"
with value it may find some wher in it's NVRAM.
So the changesto the RTC Alaram register  apmsleep or rtctexst did 
are all lost, the expanend rtctest shows the BIOS Alarm time in rtc 
alarm register!

Turning BIOS Alarm off:
rtc alarm register now holds the value previously written by rtctest.
But: The PC does not wake up in the programmed moment.

So the only way seems to be to modify the NVvalues the BIOS writes
into the RTC...



apmsleep -S is only turning fans off (they stay off!) and
tries to sent the dvb to sleep:
Sep  5 18:41:03 msi kernel: dvb_suspend()
Sep  5 18:41:03 msi kernel: dvb_suspend()
Sep  5 18:41:03 msi kernel: saa7146_suspend()
Sep  5 18:41:03 msi kernel: dvb_suspend()
but not for long:
Sep  5 18:41:10 msi kernel: saa7146_resume()
Sep  5 18:41:10 msi kernel: dvb_resume()
Sep  5 18:41:10 msi kernel: saa7146_resume()
Sep  5 18:41:10 msi kernel: dvb_resume()



msi:~/video/VDR# apmsleep -d +00:04
Current RTC time is 18:41:03.
Current local time is 18:41:03.
Setting RTC alarm time to 18:45:03.
RTC alarm time now set to 18:45:03.
Waiting until clock jumps
<60secs>
Time out -- no time leap happened



Someone already solved this problem?
It may be only one single bit ;-)

("Normal" APM users are talking only about notebooks and do
not care a lot iabout inmobiles...
Two i already asked at ACPI, but "wake up" is currently no feature, 
their seems to a lot of problems to sleep.)



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