[mythtv-users] Turning on Bus Mastering for PVR-250

[Aleaxander]

Just realized that I failed to hit reply to all when I wrote this 
e-mail.  Since others may run into this problem, I thought I should mail 
this to the list so that it gets posted into the mail archive.

> Will Dormann wrote:
> 
>> At 09:15 AM 12/2/2003 -0600, you wrote:
>>
>>> Will Dormann wrote:
>>>
>>>
>>>> At 08:44 AM 12/2/2003 -0600, you wrote:
>>>>
>>>>
>>>>> I actually have the latest bios, as this is one of the first things 
>>>>> I do with a new system setup.  Any other ideas?
>>>>
>>>>
>>>>
>>>>
>>>> Do you have PnP OS disabled in the BIOS?
>>>>
>>>>
>>>> -WD
>>>
>>>
>>> I believe so.  The option "Plug and Play Aware O/S" is set to "No", 
>>> while all DMA channels are set to "PnP", and all available IRQ's (3, 
>>> 4, 5, 7, 9, 10, 11, 14 & 15) set to "PCI/PnP".  Does PnP OS need to 
>>> be enabled?
>>
>>
>>
>>
>> No, I think it should remain disabled.   You could try clearing the ESCD
>> data in the bios.   When the BIOS lists the device on bootup, does it 
>> show
>> an assigned IRQ?
>>
>>
>> -WD
> 
> 
> Interesting.  It doesn't seem to assinged an IRQ at bootup, although it 
> is listed as "Slot 1 Multimedia Device" (at least that is what I think 
> this listing is refering to, as I've yanked nearly every device out of 
> this system).  I've tried removing all the other PCI devices, thinking 
> there was an IRQ conflict (this is starting to remind me of the Win95 
> days...), but this made no difference.  One more thing to try before I 
> send this.  Let's see what happens if I disable onboard sound, oh hell, 
> howabout everything onboard...  Nope, that didn't work either.  It seems 
> like either the Motherboard is not able to use the PVR-250 (not 
> assigning it an IRQ), or there is something wrong with the card (I'll 
> try swapping out my other one when my wife stops using the up and 
> running MythTV).
> I read a disturbing e-mail on the ivtv list earlier today that was a 
> follow up of an equally, but older, disturbing e-mail on the list that 
> was asking if anyone was ever able to get the PVR-250 to work on the 
> KT7266 motherboard I am using, but there were no replies.  This may be a 
> hardware problem that I'm not going to be able to get around.  An e-mail 
> to the MSI tech support resulted in a reply based on Windows machines 
> (I've written them back informing them that I'm talking about Linux and 
> the latest 4in1 drivers are not going to work : ), but now I think I 
> have even more information to send them (no assigned IRQ).
> 
> -Alex
>