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Re: [ivtv-users] ivtv and s2ram/s2disk (suspend/hibernate) (Hans Verkuil) Andy Walls Fri Aug 22 13:00:32 2008

On Thu, 2008-08-21 at 15:12 +0200, Ingo Steiner wrote: 
> Hans,
> 
> thank you very much for your offer to build an ivtv version which
> probably supports s2ram!
> 
> Of course I am prepared to test here. I do think the environment is
> quite suitable as my motherboard ASUS M2N-E and the other components
> support s2ram.
> 
> For your information:
> I did try already to unload the module before calling s2ram and re-load
> it after wake-up with no success. Here the modules loaded on my system:

Ingo,

How did you try to do the module load and unload?  On my Fedora 7 system
I had (s2disk?) working a while ago (I haven't tested recently).  I did
it so I could use the power button on my remote to turn off mythtv and
put the machine into suspend.  Here are some of the notes I have:


Fix the pm-suspend config to unload and reload ivtv module:


$ su - root
# cp /usr/lib/pm-utils/defaults /etc/pm/config.d/unload_module
# vim /etc/pm/config.d/unload_module
# cat /etc/pm/config.d/unload_modules
   # pm-utils suspend/hibernate config file
   # system defaults are in /usr/lib/pm-utils/defaults
   # hal calls pm-utils to do suspend on Fedora 7

   #HIBERNATE_RESUME_POST_VIDEO="no"

   SUSPEND_MODULES="ivtv cx18 "

   #DISABLE_HIBERNATE="no"
   #DISABLE_SUSPEND="no"
# chown root:root /etc/pm/config.d/unload_module
# chmod 755 /etc/pm/config.d/unload_module
# exit



Fix udev rules so mythbackend can work after resume:

$ su - root
# cd /etc/udev/rules.d
# vim 55-local.rules
# cat 55-local.rules
   KERNEL=="video*",               GROUP="mythtv"
   KERNEL=="radio*",               GROUP="mythtv"
   KERNEL=="vbi*",                 GROUP="mythtv"
   SUBSYSTEM=="dvb",               GROUP="mythtv"
# udevcontrol reload_rules
# exit


I did the stuff below as well for the sake of mythtv running as non-root
user, but it didn't matter/or didn't work.  This stuff only probably
gets checked on an event that doesn't happen on resume (hal database
updated with *new* ivtv device, pam console transfer/revert))


Add /etc/security/console.perms.d/60-local.perms to give dvb & v4l
access to mythtv group:

    # permission definitions for mythbackend
    #<console>  0660 <sound>      0660 root.mythtv
    <console>  0660 <v4l>        0660 root.mythtv
    <console>  0660 <dvb>        0660 root.mythtv




On resume have HAL give mythtv permissions to /dev/video again:
  
$ su - root 
# vim 
/usr/share/hal/fdi/policy/20thirdparty/90-grant-v4l-devices-to-mythtv-group.fdi
# cat 
/usr/share/hal/fdi/policy/20thirdparty/90-grant-v4l-devices-to-mythtv-group.fdi
   <?xml version="1.0" encoding="UTF-8"?>

   <deviceinfo version="0.2">
     <device>
       <!-- grant access to v4l devices to mythtv group so mythbackend works -->
       <match key="info.capabilities" contains="access_control">
         <match key="info.capabilities" contains="video4linux">
           <append key="access_control.grant_group" 
type="strlist">mythtv</append>
         </match>
         <match key="info.capabilities" contains="dvb">
           <append key="access_control.grant_group" 
type="strlist">mythtv</append>
         </match>
       </match>
     </device>
   </deviceinfo>
# /sbin/service haldaemon restart
# exit



Regards,
Andy






> lsmod |grep ivtv
> ivtv                  152512  0
> i2c_algo_bit            8452  1 ivtv
> cx2341x                14596  1 ivtv
> tveeprom               20624  1 ivtv
> videodev               30720  1 ivtv
> v4l2_common            21888  6 wm8775,cx25840,tuner,ivtv,cx2341x,videodev
> v4l1_compat            15492  2 ivtv,videodev
> i2c_core               28544  13
> wm8775,cx25840,tuner,tea5767,tda8290,tuner_simple,mt20xx,tea5761,ivtv,i2c_algo_bit,tveeprom,nvidia,i2c_nforce2
> 
> I am running here Ubuntu-Hardy amd64 with kernel:
> 
> cat /proc/version
> Linux version 2.6.24-19-generic ([EMAIL PROTECTED]) (gcc version 4.2.3 (Ubuntu
> 4.2.3-2ubuntu7)) #1 SMP Fri Jul 11 21:01:46 UTC 2008
> 
> If you need any more information, please let me know.
> 
> Many thanks and regards,
> Ingo


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