saa7134 doesn't work after warm-reboot

saa7134 doesn't work after warm-reboot

[David Whyte]

My brothers mythTV setup currently consists of one MBE with 2x DVB-T
tuners in.

Both tuners are from identical Medion PCs and report the following
from dmesg when booted...

mythtv-user@mythBE1:~$ dmesg | grep -i dvb
[   62.626167] saa7134[0] Board has DVB-T
[   63.405856] saa7134[1] Board has DVB-T
[   63.933725] DVB: registering new adapter (saa7134[0])
[   63.933729] DVB: registering frontend 0 (Philips TDA10046H DVB-T)...
[   66.281192] DVB: registering new adapter (saa7134[1])
[   66.281197] DVB: registering frontend 1 (Philips TDA10046H DVB-T)...

My brother lives in an area that suffers very short power-outages if
there is a storm or whatever and I have noticed that after such an
event, he loses the ability to record TV from both tuners and
generally only one will work.  I am never sure if it is always the
same tuner that as busted since I don't know which is dvb0 or dvb1 at
any point in time.

To correct this, I remote into the server and issue a 'halt', get him
to unplug it from the wall then press the power button on the front of
the machine, re-plug it into the wall and boot up the server.  Then
both tuners are working fine.

I understand the best way around this might be a UPS, but I don't have
the ability to get one at the moment, though it will be his next
purchase.

In the meantime I was wandering if anyone had any suggestions for
getting around this problem.  For my tuners that used to suffer a
similar problem (but which are different tuners) I had to add some
lines to rc.local to remove the dvb modules and then re-insert them
and this seemed to work.  There are a number of similar posts in the
archives like this.  I have tried this for the saa7134 modules but to
no avail.

The following output is for reference:
mythtv-user@mythBE1:~$ lsmod | grep -i saa
saa7134_dvb            21516  0
videobuf_dvb            7812  1 saa7134_dvb
dvb_core               80636  2 saa7134_dvb,videobuf_dvb
saa7134               143828  1 saa7134_dvb
videodev               35072  2 saa7134,tuner
compat_ioctl32          2304  1 saa7134
v4l2_common            12672  2 saa7134,tuner
videobuf_dma_sg        14980  2 saa7134_dvb,saa7134
videobuf_core          19716  3 videobuf_dvb,saa7134,videobuf_dma_sg
ir_kbd_i2c             11152  1 saa7134
ir_common              40580  2 saa7134,ir_kbd_i2c
tveeprom               13444  1 saa7134
i2c_core               24832  12
saa7134_dvb,saa7134,tda1004x,tuner_simple,tda9887,tda8290,tuner,v4l2_common,ir_kbd_i2c,tveeprom,i2c_i810,i2c_algo_bit
mythtv-user@mythBE1:~$

mythtv-user@mythBE1:~$ cat /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

/sbin/rmmod saa7134_dvb saa7134 videobuf_dvb dvb_core

/sbin/modprobe saa7134_dvb

exit 0
mythtv-user@mythBE1:~$

The machine is a Pentium 4 running Ubuntu Hardy:
mythtv-user@mythBE1:~$ uname -r
2.6.24-24-generic
mythtv-user@mythBE1:~$

mythtv-user@mythBE1:~$ modinfo saa7134_dvb
filename:       /lib/modules/2.6.24-24-generic/updates/dkms/saa7134-dvb.ko
license:        GPL
author:         Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
srcversion:     C8C85F1BA098BDF283F1975
depends:        saa7134,dvb-core,videobuf-dvb,videobuf-dma-sg,i2c-core
vermagic:       2.6.24-24-generic SMP mod_unload 586
parm:           antenna_pwr:enable antenna power (Pinnacle 300i) (int)
parm:           use_frontend:for cards with multiple frontends (0:
terrestrial, 1: satellite) (int)
parm:           debug:Turn on/off module debugging (default:off). (int)
parm:           adapter_nr:DVB adapter numbers (array of short)
mythtv-user@mythBE1:~$

Similar bug in launchpad, but no saa7134_also module is loaded for these cards.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/349537

Any help is greatly appreciated.

Regards,
Whytey

Re: saa7134 doesn't work after warm-reboot

[David Whyte]

On Wed, Sep 9, 2009 at 1:37 PM, David Whyte <david.whyte@gmail.com> wrote:

> My brother lives in an area that suffers very short power-outages if
> there is a storm or whatever and I have noticed that after such an
> event, he loses the ability to record TV from both tuners and
> generally only one will work.  I am never sure if it is always the
> same tuner that as busted since I don't know which is dvb0 or dvb1 at
> any point in time.
>
> To correct this, I remote into the server and issue a 'halt', get him
> to unplug it from the wall then press the power button on the front of
> the machine, re-plug it into the wall and boot up the server.  Then
> both tuners are working fine.
>

Further info, the power outage was for about 10 seconds in the latest
incident.  Also, there is no need to unplug the PC power from the wall
and press the power button etc to recover, you just need to leave the
machine powered down for a short while.

Sounds a lot like the issues I have read about where the firmware
remains in the tuner card but is corrupt or something.  The only way
is to clear the firmware and re-upload it, generally by powering down
for sometime but I am hoping that you can do this by unloading then
loading the modules.

Is this possible?  Anyone know which modules in this instance?

Regards,
Whytey

Re: saa7134 doesn't work after warm-reboot

[Morvan Le Meut]

I've seen computer act strangely after such short power outage ( 
especially when that outage take a few ms ). Usually, the culprit is a 
low quality power supply, and i solve it by using a better quality one 
plus a surge protector (when i can't convice to buy a small UPS, at 
least :) ).

Beyond that suggestion i can't help you.

David Whyte a écrit :
> Further info, the power outage was for about 10 seconds in the latest
> incident.  Also, there is no need to unplug the PC power from the wall
> and press the power button etc to recover, you just need to leave the
> machine powered down for a short while.
>
> Sounds a lot like the issues I have read about where the firmware
> remains in the tuner card but is corrupt or something.  The only way
> is to clear the firmware and re-upload it, generally by powering down
> for sometime but I am hoping that you can do this by unloading then
> loading the modules.
>
> Is this possible?  Anyone know which modules in this instance?
>
> Regards,
> Whytey
> --
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