<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <p>Hi again, below is a relevant thread<br>
    </p>
    <p><a class="moz-txt-link-freetext" href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575872">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575872</a><br>
    </p>
    Regards,<br>
    <br>
    <div class="moz-cite-prefix">On 06/05/2018 01:51 πμ, Kyprianos
      Papadimitriou wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:0356379d-7f93-7967-0364-b1bf965c02ba@mhl.tuc.gr">Hello,
      <br>
      <br>
      See below please
      <br>
      <br>
      <br>
      On 02/05/2018 06:44 πμ, Kai Heng Feng wrote:
      <br>
      <blockquote type="cite">Hi,
        <br>
        <br>
        <blockquote type="cite">On Apr 29, 2018, at 8:20 PM, Kyprianos
          Papadimitriou <a class="moz-txt-link-rfc2396E" href="mailto:kpapadim@mhl.tuc.gr"><kpapadim@mhl.tuc.gr></a> wrote:
          <br>
          <br>
          see below
          <br>
          <br>
          <br>
          On 26/04/2018 08:18 μμ, Kai-Heng Feng wrote:
          <br>
          <blockquote type="cite">Hi Kyprianos,
            <br>
            <br>
            at 21:22, Kyprianos Papadimitriou
            <a class="moz-txt-link-rfc2396E" href="mailto:kpapadim@mhl.tuc.gr"><kpapadim@mhl.tuc.gr></a> wrote:
            <br>
            <br>
            <blockquote type="cite">Hello,
              <br>
              <br>
              The following might be a problem related to unsupported
              devices by the Kernel.
              <br>
              I am facing the problem described in the thread:
              <a class="moz-txt-link-freetext" href="https://ubuntuforums.org/showthread.php?t=2342985">https://ubuntuforums.org/showthread.php?t=2342985</a>
              <br>
            </blockquote>
            <br>
            If this is what you are facing, the HID quirk won't do
            anything. The USB host controller failed to work in this
            case.
            <br>
            <br>
            <blockquote type="cite">And my problem is that I don't know
              how to do the : quirk HID_QUIRK_ALWAYS_POLL (0x00000400),
              which is mentioned in the above link.
              <br>
            </blockquote>
            <br>
            Please file a bug at <a class="moz-txt-link-freetext" href="https://launchpad.net">https://launchpad.net</a>.
            <br>
            <br>
            Kai-Heng
            <br>
          </blockquote>
          <br>
          I should first create an account, then file the bug?
          <br>
        </blockquote>
        <br>
        Yes, that will be great.
        <br>
        <br>
        Kai-Heng
        <br>
        <br>
      </blockquote>
      <br>
      I 've just reported it as bug at <a class="moz-txt-link-freetext" href="https://launchpad.net">https://launchpad.net</a>, it got the
      ID#1769403, with subject : "USB devices (trackball and PS2-to-usb
      keyboard) freeze in Ubuntu Mate 16.04.4 , and DELL latitude"
      <br>
      <br>
      <blockquote type="cite">
        <blockquote type="cite">
          <br>
          Thanks
          <br>
          <br>
          Kyprianos
          <br>
          <br>
          <blockquote type="cite">
            <blockquote type="cite">lsusb command for the 2 devices
              gives:
              <br>
              <br>
              Bus 002 Device 009: ID 046d:c404 Logitech, Inc. TrackMan
              Wheel
              <br>
              <br>
              Bus 002 Device 010: ID 0a81:0205 Chesen Electronics Corp.
              PS/2 Keyboard+Mouse Adapter
              <br>
              <br>
              tlp-stat -u command for the 2 devices gives:
              <br>
              <br>
              Bus 002 Device 009 ID 046d:c404 control = on,
              autosuspend_delay_ms = -1000 -- Logitech, Inc. TrackMan
              Wheel (usbhid)
              <br>
              <br>
              Bus 002 Device 010 ID 0a81:0205 control = on,
              autosuspend_delay_ms = -1000 -- Chesen Electronics Corp.
              PS/2 Keyboard+Mouse Adapter (usbhid)
              <br>
              <br>
              uname -ra gives:
              <br>
              <br>
              Linux dell 4.13.0-39-generic #44~16.04.1-Ubuntu SMP Thu
              Apr 5 16:43:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
              <br>
              <br>
              I think the problem is not related with autosuspend, but
              rather with buffer overflow for the specific devices due
              to that they are not supported in the kernel code.
              <br>
              <br>
              Best Regards,
              <br>
              Kyprianos
              <br>
              <br>
              -- <br>
              kernel-team mailing list
              <br>
              <a class="moz-txt-link-abbreviated" href="mailto:kernel-team@lists.ubuntu.com">kernel-team@lists.ubuntu.com</a>
              <br>
              <a class="moz-txt-link-freetext" href="https://lists.ubuntu.com/mailman/listinfo/kernel-team">https://lists.ubuntu.com/mailman/listinfo/kernel-team</a>
              <br>
            </blockquote>
            <br>
            <br>
            .
            <br>
          </blockquote>
        </blockquote>
        .
        <br>
        <br>
      </blockquote>
      <br>
    </blockquote>
    <br>
    <div class="moz-signature">-- <br>
      <p style="color:#7E7E7E">
        Kyprianos Papadimitriou, PhD<br>
        School of Electrical & Computer Engineering<br>
        Technical University of Crete<br>
        GR 73100 Chania, Greece<br>
        email: kpapadim(AT)mhl(DOT)tuc(DOT)gr<br>
        url: <a href="http://users.isc.tuc.gr/%7Ekpapadimitriou">users.isc.tuc.gr/~kpapadimitriou</a><br>
        url: <a href="http://www.ece.tuc.gr/5990.html">www.ece.tuc.gr/5990.html</a><br>
        tel: (+30) 28210 37219<br>
        fax: (+30) 28210 37542
      </p>
    </div>
  </body>
</html>