Mailing List Archive

On Sat, 7 May 2022 17:13:13 +0100, you wrote:

>Hi All,
>
>I have a MythTV 31 system running on a RHEL 8 clone. It has two
>Hauppauge HVR5525 dual S2/T2 tuners. They both work normally but today
>one of the tuners cards, both T2 & S2, are timing out when tuning.
>
>Is there a way to soft reset/reboot the tuner. Make it reload its
>firmware etc, rather than rebooting the machine?
>
>I tried removing the cx23885 module once before in an attempt to
>accomplish this and unexpectedly it provoked a kernel panic.
>
>Thanks
>
>Ken

I do not think there is any generic way of resetting a PCIe card. With
USB devices, you can reset the USB port, but PCIe does not seem to
have any similar facility. So you will need to reboot to get the card
going again. In fact, with problems like that, I would recommend
powering down completely and allowing the capacitance in the system to
drain before rebooting, so that you are sure the card will be cold
started rather than warm started. And if you have the time, while the
PC is off, take off the covers and try re-seating that card. If it
does not fit in its socket very well, the weight of the aerial cables
can lever the card around in the socket, potentially causing all sorts
of problems. Make sure you have its bracket screwed down properly.
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Stephen Worthington wrote:
> On Sat, 7 May 2022 17:13:13 +0100, you wrote:
>
>> Hi All,
>>
>> I have a MythTV 31 system running on a RHEL 8 clone. It has two
>> Hauppauge HVR5525 dual S2/T2 tuners. They both work normally but today
>> one of the tuners cards, both T2 & S2, are timing out when tuning.
>>
>> Is there a way to soft reset/reboot the tuner. Make it reload its
>> firmware etc, rather than rebooting the machine?
>>
>> I tried removing the cx23885 module once before in an attempt to
>> accomplish this and unexpectedly it provoked a kernel panic.
>>
>> Thanks
>>
>> Ken
> I do not think there is any generic way of resetting a PCIe card. With
> USB devices, you can reset the USB port, but PCIe does not seem to
> have any similar facility. So you will need to reboot to get the card
> going again. In fact, with problems like that, I would recommend
> powering down completely and allowing the capacitance in the system to
> drain before rebooting, so that you are sure the card will be cold
> started rather than warm started. And if you have the time, while the
> PC is off, take off the covers and try re-seating that card. If it
> does not fit in its socket very well, the weight of the aerial cables
> can lever the card around in the socket, potentially causing all sorts
> of problems. Make sure you have its bracket screwed down properly.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org
>
Hi Stephen,

I suspected as much. I was needing to do a memory upgrade to that
machine anyway so it was powered off completely while I did that.

The errant card is running again.

Thank you.


PS: I have recently upgraded from 0.24 to 0.31 and I really like the
changes. Thank you to all the team who look after MythTV.



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On Sat, May 7, 2022 at 2:25 PM Ken Smith via mythtv-users <
mythtv-users@mythtv.org> wrote:

>
>
> Stephen Worthington wrote:
> > On Sat, 7 May 2022 17:13:13 +0100, you wrote:
> >
> >> Hi All,
> >>
> >> I have a MythTV 31 system running on a RHEL 8 clone. It has two
> >> Hauppauge HVR5525 dual S2/T2 tuners. They both work normally but today
> >> one of the tuners cards, both T2 & S2, are timing out when tuning.
> >>
> >> Is there a way to soft reset/reboot the tuner. Make it reload its
> >> firmware etc, rather than rebooting the machine?
> >>
> >> I tried removing the cx23885 module once before in an attempt to
> >> accomplish this and unexpectedly it provoked a kernel panic.
> >>
> >> Thanks
> >>
> >> Ken
> > I do not think there is any generic way of resetting a PCIe card. With
> > USB devices, you can reset the USB port, but PCIe does not seem to
> > have any similar facility. So you will need to reboot to get the card
> > going again. In fact, with problems like that, I would recommend
> > powering down completely and allowing the capacitance in the system to
> > drain before rebooting, so that you are sure the card will be cold
> > started rather than warm started. And if you have the time, while the
> > PC is off, take off the covers and try re-seating that card. If it
> > does not fit in its socket very well, the weight of the aerial cables
> > can lever the card around in the socket, potentially causing all sorts
> > of problems. Make sure you have its bracket screwed down properly.
> >
>

It is actually possible. Get the pciid of the device with lspci and then
remove that device from the bus - eg:

for device 00:1f.5, you would:

echo 1 > /sys/devices/pci0000\:00/0000\:00\:1f.5/remove

followed by:

echo 1 > /sys/*bus*/*pci*/*rescan*



> Hi Stephen,
>
> I suspected as much. I was needing to do a memory upgrade to that
> machine anyway so it was powered off completely while I did that.
>
> The errant card is running again.
>
> Thank you.
>
>
> PS: I have recently upgraded from 0.24 to 0.31 and I really like the
> changes. Thank you to all the team who look after MythTV.
>
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
> _______________________________________________
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> mythtv-users@mythtv.org
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> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org
>