[mythtv-users] Problems with P5Q motherboard and cx88 tuner

[George Mari]

On 10/04/2009 06:17 AM, Greg Lucas-Smith wrote:
<deleted>
>    I have 2 Leadtek DTV1000s that have sered me very well for a few years
> now.  The one in PCI slot 1 works, the one in the other slot doesn't and I
> get a "Tuner is asleep" message from myth.  If I swap them around, or only
> have one, PCI slot 1 always works.  Does anyone have any ideas how to
> resolve this?  It doesn't happen all of the time, about 2 reboots in 3 will
> present the problem and on the third it will perform as normal.
>
<deleted>

I think this is your problem:

> and I get this message in my dmesg:
>
<deleted>
> [   13.805734] IRQ 16/cx88[1]: IRQF_DISABLED is not guaranteed on shared
> IRQs
<deleted>
> [   13.806203] IRQ 18/cx88[0]: IRQF_DISABLED is not guaranteed on shared
> IRQs

Your motherboard is messing up or somehow restricting IRQ assignmemnts 
or IRQ sharing between the two cards, it looks like.  One of your cards 
is on IRQ 16, and the other is on IRQ 18 - but for some reason, the cx88 
driver still thinks they are on a shared IRQ somehow?

Take the first card out of PCI slot 1 - try slots 2 and 3, or some other 
combination without slot 1.

Read your motherboard manual for information on how it deals with shared 
IRQs, check your BIOS options.  See if there is a BIOS update available, 
or even consider downgrading the BIOS, if possible.

Motherboard bugs are not uncommon.  I recently had to re-purpose a 
Socket 754 board that I was planning on using as a consolidated server 
(with 6 PCI slots) but I had to change plans because it would not allow 
any mass storage card I had - SCSI or SATA - to co-exist with my 
PVR-350.  Somehow the BIOS would not assign resources to both cards 
properly while they co-existed in any combination of slots.  Either card 
was fine without the other - PVR-350 with no storage cards, or storage 
cards without PVR-350.  No more BIOS updates available for the 
motherboard, and the manufacturer appears to be out of business anyway.