Bug#800085: linux-image-4.1.0-2-armmp: The ethernet fails to come up on my Allwinner A10 device.
On Sun, 2015-10-04 at 11:17 +0100, Ian Campbell wrote:
> I agree, the URL suggests:
> > CONFIG_REGULATOR_DEBUG=y
> > CONFIG_REGULATOR_VIRTUAL_CONSUMER=y
> > CONFIG_REGULATOR_USERSPACE_CONSUMER=y
> > CONFIG_PWM_SUN4I=y
>
[...]
> My best guess is that one of these has some sort of knock-on dependency
> which causes something else to be enabled. I'm going to investigate
> that possibility now...
Nope, it turns out PWM_SUN4I is already on in our config and the other
three are independent and turn on nothing else, which was basically as
expected since they are all virtual.
SUN4I_PWM is a module, so it might be worth modprobing that (module
will be pwm-sun4i it seems) to ensure it is loaded and see if that
helps. I don't think it will though.
> In the meantime:
>
> > Please send the boot log from Linux 4.1 (or 4.2, which just landed in
> > unstable).
>
> Yes, please.
>
> It would also be useful/interesting to know which Allwinner A10 device
> this was with.
... and the .config for your working self-built kernel would be useful
for comparison too. As well as a dmesg from both the Debian kernel and
that one.
Given the self-built+working kernel was 3.16 based and the Debian one
was 4.1 it may just be that 4.1 has a bug with the Ethernet, so trying
4.2 would indeed be wise too.
Ian.
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