Re: [libgpiod] Strange error

Please, reply to all, including the mailing list. (Asn do not top-post!)

On Mon, Nov 22, 2021 at 9:42 PM James Nugen [off-list ref] wrote:

'gpiodetect' output:
gpiochip0 [INT34BB:00] (312 lines)
gpiochip1 [ftdi-cbus] (4 lines)

I can try v5.15.

Please do.

I should mention everything works correctly on a laptop running
'5.4.0-89-generic'.

Perhaps, I should try downgrading to 5.4 on the NUC.

It's too far from the current kernels, we wouldn't be able to bisect
in a reasonable time.

On Mon, Nov 22, 2021 at 11:23 AM Andy Shevchenko
[off-list ref] wrote:

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On Mon, Nov 22, 2021 at 9:00 PM James Nugen [off-list ref] wrote:

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Hello,

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Thanks,
James Nugen

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I'm getting a weird error when trying to access GPIOs from my machine.
The "gpioinfo" command is returning this error message:
"gpioinfo: error creating line iterator: Invalid argument"
This happens as a regular user and as root (via sudo).
"gpioget" returns a similar error.
"gpiodetect" works and finds two devices.

What's the output of `gpiodetect`?

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The machine is an Intel NUC running Ubuntu 20.04.
Here is the "uname" output:
Linux nuc 5.11.0-38-generic #42~20.04.1-Ubuntu SMP Tue Sep 28 20:41:07
UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

The installed version of "libgpiod" is v1.4,1.
I tried the latest version (v1.6.3) and got the same errors.

Is it possible to try the v5.15 kernel on your side?

--
With Best Regards,
Andy Shevchenko

-- 
With Best Regards,
Andy Shevchenko