[mythtv-users] Hauppauge HVR 5525 cx23885 Soft Reboot

Ken Smith kens at kensnet.org
Sat May 7 19:23:09 UTC 2022

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.
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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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