[meta-oe] udev 171 is broken

[meta-oe] udev 171 is broken

[Otavio Salvador]

Hello,

Our system stoped to work and all the probing has starting to fail. We
tracked it down to udev 171 update. It used to work fine but now fails
completely. Reverting back to udev 164 fixes it.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: [meta-oe] udev 171 is broken

[Koen Kooi]

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On 31-05-11 17:13, Otavio Salvador wrote:
> Hello,
> 
> Our system stoped to work and all the probing has starting to fail. We
> tracked it down to udev 171 update. It used to work fine but now fails
> completely. Reverting back to udev 164 fixes it.

Hmm, it works on all the platforms I tested. What kind of failures are
you getting? And more importantly, which kernel versions are you using?
Have a look at
http://git.kernel.org/?p=linux/hotplug/udev.git;a=blob;f=README;h=f85637068547d681c6b79686e9add05abf1d44ca;hb=171
to see what requirements there are for the kernel.

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Re: [meta-oe] udev 171 is broken

[Otavio Salvador]

On Tue, May 31, 2011 at 15:27, Koen Kooi <koen@dominion.thruhere.net> wrote:
> Hmm, it works on all the platforms I tested. What kind of failures are
> you getting? And more importantly, which kernel versions are you using?

It doesn't load any module on the system. I am using 2.6.37 and it
does work fine with udev 164 and previous meta-oe one too.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: [meta-oe] udev 171 is broken

[Koen Kooi]

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On 31-05-11 18:39, Otavio Salvador wrote:
> On Tue, May 31, 2011 at 15:27, Koen Kooi <koen@dominion.thruhere.net> wrote:
>> Hmm, it works on all the platforms I tested. What kind of failures are
>> you getting? And more importantly, which kernel versions are you using?
> 
> It doesn't load any module on the system. I am using 2.6.37 and it
> does work fine with udev 164 and previous meta-oe one too.

That's expected, the OE modprobe rule move to udev-extra-rules:

http://cgit.openembedded.org/cgit.cgi/meta-openembedded/commit/?id=7aa7dd55db8db6ec350c743ce42eb469395a3208

I was thinking of putting it back in, could you try creating a rule with

ACTION=="add", DEVPATH=="/devices/*", ENV{MODALIAS}=="?*",
RUN+="/sbin/modprobe $env{MODALIAS}"

and rebooting?

regards,

Koen

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Re: [meta-oe] udev 171 is broken

[Otavio Salvador]

On Tue, May 31, 2011 at 17:25, Koen Kooi <koen@dominion.thruhere.net> wrote:
...
> I was thinking of putting it back in, could you try creating a rule with
...

I didn't try it yet but seems logical to support it out of box.
Otherwise udev could rrecomends udev-extra-rules so it also works by
default. If someone put it on bad-recomendation then he/she can handle
it.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: [meta-oe] udev 171 is broken

[Koen Kooi]

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On 31-05-11 20:19, Otavio Salvador wrote:
> On Tue, May 31, 2011 at 17:25, Koen Kooi <koen@dominion.thruhere.net> wrote:
> ...
>> I was thinking of putting it back in, could you try creating a rule with
> ...
> 
> I didn't try it yet but seems logical to support it out of box.
> Otherwise udev could rrecomends udev-extra-rules so it also works by
> default. If someone put it on bad-recomendation then he/she can handle
> it.

On a c3 beagleboard the rule made booting 0.2 seconds slower with
systemd, which seems a good trade-off, so it's pack in the main udev
package now.

regards,

Koen

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