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List:       libusb-devel
Subject:    Re: [libusb] usb relay board does not work with linux kernel newer than 5.3.18
From:       Hans_Jürgen_Mayer <mail () hjmayer ! de>
Date:       2021-08-19 13:40:35
Message-ID: 343765d7-23cb-a91b-9273-3ab4715adfa5 () hjmayer ! de
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It cannot be a udev rules problem, because it also does not work
as root. And, as you can see from the logs, the libusb returns
successful detaching of the kernel driver.




Am 19.08.21 um 03:38 schrieb Xiaofan Chen:
> On Wed, Aug 18, 2021 at 10:47 PM Hans Jürgen Mayer <mail@hjmayer.de> wrote:
>> Hi, thanks for all answers. The problem has been solved:
>>
>> http://bugzilla.opensuse.org/show_bug.cgi?id=1189466
> Thanks for the updates. By right, libusb should work as well
> if you can successfully detach the kernel driver (with the right
> permission using sudo or udev rules). So that is a
> bit strange.
>
> Maybe the udev rules are not set up right.
>
> Anyway, if you can blacklist ch341 kernel driver, that is sure to
> fix your issue.
>
>
>


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    <div class="moz-cite-prefix">It cannot be a udev rules problem,
      because it also does not work<br>
      as root. And, as you can see from the logs, the libusb returns <br>
      successful detaching of the kernel driver. <br>
      <br>
      <br>
      <br>
      <br>
      Am 19.08.21 um 03:38 schrieb Xiaofan Chen:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAGjSPUDt6Y1jA1WDgwgFdL=gBTja8=6kPvjuW4-UePiEBdfWRQ@mail.gmail.com">
      <pre class="moz-quote-pre" wrap="">On Wed, Aug 18, 2021 at 10:47 PM Hans \
Jürgen Mayer <a class="moz-txt-link-rfc2396E" \
href="mailto:mail@hjmayer.de">&lt;mail@hjmayer.de&gt;</a> wrote: </pre>
      <blockquote type="cite">
        <pre class="moz-quote-pre" wrap="">
Hi, thanks for all answers. The problem has been solved:

<a class="moz-txt-link-freetext" \
href="http://bugzilla.opensuse.org/show_bug.cgi?id=1189466">http://bugzilla.opensuse.org/show_bug.cgi?id=1189466</a>
 </pre>
      </blockquote>
      <pre class="moz-quote-pre" wrap="">
Thanks for the updates. By right, libusb should work as well
if you can successfully detach the kernel driver (with the right
permission using sudo or udev rules). So that is a
bit strange.

Maybe the udev rules are not set up right.

Anyway, if you can blacklist ch341 kernel driver, that is sure to
fix your issue.



</pre>
    </blockquote>
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