Re: Question: eth0 vs enp1s0 (second try)
On Fri 08 Jan 2016 at 02:36:20 +0100, Vincent Lefevre wrote:
> On 2016-01-07 18:47:48 +0000, Brian wrote:
> > Many WiFi devices require firmware. Some of those devices will not have
> > an interface registered (they are not initialised) if the firmware is
> > not present to be loaded into the device. Other devices get an interface
> > whether the firmware is present or not.
>
> According to lshw, the firmware is 16.242414.0, which is provided
> by /lib/firmware/iwlwifi-3160-16.ucode from the firmware-iwlwifi
> package.
>
> > If there is no interface there is nothing for the Jessie udev to put
> > in 70-persistent-net.rules.
>
> According to the dpkg logs, udev was upgraded to 220-7 before I
> installed firmware-iwlwifi. But according to the udev changelog,
> the switch to net.ifnames is just for new installations and for
> new hardware. Here the hardware was already there; there was just
> no firmware.
The ethernet interface is the only one mentioned in the .rules file
because there was no wlan0 interface due to a lack of firmware on
Jessie. eth0 is not renamed on upgrade to unstable because there is
a rule for it. There is no rule for wlan0 so it gets a predictable
name. You can change to a custom name by devising a rule for the
interface; udev will not generate one for you.
The switch to net.ifnames has honoured what was on the previous
installation.
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