[mythtv-users] Udev

[Ian Campbell]

On Wed, 2018-11-28 at 01:49 +1300, Stephen Worthington wrote:
> But it usually does not matter, as the kernel has a
> fixed order for how it enumerates the PCIe and PCI slots.  So as long
> as you do not move the cards, they will always be in the same
> order.  You will likely not be moving the cards around in the slots
> for years, unlike with USB tuners that tend to get unplugged for some
> reason or other and then you forget which USB socket they were
> in.

Quite a few (i.e. all the Hauppauge ones I've ever had) PCI capture
cards are really just a PCI USB controller with a USB tuner (or two) on
them. In that case you become susceptible to the async USB enumeration
again.

(Historical note: The kernel did once upon a time change how it
enumerates PCI buses by default, from breadth first to depth first, but
it was so long ago, in the 2.4.x era, that there is no way anyone here
is running a kernel old enough for it to matter. Anyone who is
nostalgic can use pci=bfsort to get the old behaviour ;-))

Ian.