[mythtv-users] Enabling IOMMU seems to have broken my tuners

George Bingham georgeb1962 at gmail.com
Mon Jan 30 21:11:38 UTC 2023


On Sun, Jan 29, 2023 at 2:12 PM Gary Buhrmaster <gary.buhrmaster at gmail.com>
wrote:

> On Sat, Jan 28, 2023 at 2:24 AM Gary Buhrmaster
> <gary.buhrmaster at gmail.com> wrote:
>
> > The Z210 uses the C206 chipset, which might
> > need its own quirk settings for the Hauppauge
> > cards.
>
> The C206 chipset is a Xeon targeted chipset, and
> the code in one of the possibly related drivers
> mention some Xeon chipsets can be impacted,
> with a likely error in the logs of the form:
>     mpeg risc op code error
>
> If your card uses the cx23885 driver, try adding a
>
>    options cx23885 dma_reset_workaround=2
>
> to an appropriate modprobe.conf.d file (if it does
> not help, remove it).
>
> Hi Gary,

Hey, that worked!  Thank You, how in the heck did you figure that out??

Anyway, glad you did, thank you!
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