[ubuntu-mythtv] IEEE1394/firewire problems after update

[David Lambert]

Marc,
     Thanks for your suggestions. Unfortunately I just did a blind 
apt-get update/upgrade rather than a more incremental approach so I am 
not sure what changed caused the firewire behavior change. I notice that 
the file /etc/modprobe.d/blacklist-firewire.conf contains:

# Select the legacy firewire stack over the new CONFIG_FIREWIRE one.

blacklist ohci1394
blacklist sbp2
blacklist dv1394
blacklist raw1394
blacklist video1394

#blacklist firewire-ohci
#blacklist firewire-sbp2

This appears wrong to my inexpert eye, in that I thought the raw1394 was 
a legacy module?

Anyway. I think I just need to keep digging :)


Dave.


On 12/08/2010 02:06 PM, Marc Randolph wrote:
> On Wed, Dec 8, 2010 at 8:47 AM, David Lambert<dave at lambsys.com>  wrote:
>> I just updated Mythbuntu 10.10 to Linux mythbuntu2 2.6.35-23-generic
>> #41-Ubuntu SMP and my IEEE1394 interface stopped working. I notice that
>> not even the raw driver module (raw1394) is loaded, and dmesg says:
> Howdy David,
>
> This would not be something that changed in Mythbuntu specifically, so
> any change(s) you see would be the same as base Ubuntu.  You might
> search the forums and see if anyone has encountered the same issue.
>
> BTW, are you saying you simply upgraded kernel revs?  If you drop back
> to a previous rev and it works fine, then I would encourage you to
> open a kernel bug report on launchpad by issuing the command
> "ubuntu-bug linux"
>
> Things to investigate before doing that:
>
> https://help.ubuntu.com/community/Firewire points out that you may
> need to do the following:
>
> echo 'KERNEL=="raw1394", GROUP="video", MODE="0664"' |
> sudo tee /etc/udev/rules.d/50-raw1394.rules
> &&  sudo restart udev
>
> Of course, I think that may have applied for several versions now, so
> if it was working for you recently and the permissions are still
> correct after the upgrade, that may not be it.
>
> It doesn't apply to your version, but there are previous reports of
> similar problems related to /dev/raw1394
> https://bbs.archlinux.org/viewtopic.php?id=87846, which also points to
> a blacklisting problem
> http://newyork.ubuntuforums.org/showthread.php?p=8542962
>
> It seems pretty unlikely that you'd be the first person to run into
> this, so I really would search the forums.
>
> Good luck,
>
>     Marc
>

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