[ubuntu-mythtv] IEEE1394/firewire problems after update

[David Lambert]

Just for completeness. The cause of this problem turned out to be a very 
sick motherboard which has just gone to its final resting place. Its 
demise was gradual and had multiple symptoms. Hence the illogical 
behavior. Thanks for the help, and sorry for any confusion.

Dave.



On 12/08/2010 03:39 PM, David Lambert wrote:
> 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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