<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi again, below is a relevant thread <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> Regards, <div class="moz-cite-prefix">On 06/05/2018 01:51 πμ, Kyprianos Papadimitriou wrote: </div> <blockquote type="cite" cite="mid:0356379d-7f93-7967-0364-b1bf965c02ba@mhl.tuc.gr">Hello, See below please On 02/05/2018 06:44 πμ, Kai Heng Feng wrote: <blockquote type="cite">Hi, <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: see below On 26/04/2018 08:18 μμ, Kai-Heng Feng wrote: <blockquote type="cite">Hi Kyprianos, at 21:22, Kyprianos Papadimitriou <a class="moz-txt-link-rfc2396E" href="mailto:kpapadim@mhl.tuc.gr"><kpapadim@mhl.tuc.gr></a> wrote: <blockquote type="cite">Hello, The following might be a problem related to unsupported devices by the Kernel. 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> </blockquote> If this is what you are facing, the HID quirk won't do anything. The USB host controller failed to work in this case. <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. </blockquote> Please file a bug at <a class="moz-txt-link-freetext" href="https://launchpad.net">https://launchpad.net</a>. Kai-Heng </blockquote> I should first create an account, then file the bug? </blockquote> Yes, that will be great. Kai-Heng </blockquote> 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" <blockquote type="cite"> <blockquote type="cite"> Thanks Kyprianos <blockquote type="cite"> <blockquote type="cite">lsusb command for the 2 devices gives: Bus 002 Device 009: ID 046d:c404 Logitech, Inc. TrackMan Wheel Bus 002 Device 010: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter tlp-stat -u command for the 2 devices gives: Bus 002 Device 009 ID 046d:c404 control = on, autosuspend_delay_ms = -1000 -- Logitech, Inc. TrackMan Wheel (usbhid) Bus 002 Device 010 ID 0a81:0205 control = on, autosuspend_delay_ms = -1000 -- Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter (usbhid) uname -ra gives: 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 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. Best Regards, Kyprianos -- kernel-team mailing list <a class="moz-txt-link-abbreviated" href="mailto:kernel-team@lists.ubuntu.com">kernel-team@lists.ubuntu.com</a> <a class="moz-txt-link-freetext" href="https://lists.ubuntu.com/mailman/listinfo/kernel-team">https://lists.ubuntu.com/mailman/listinfo/kernel-team</a> </blockquote> . </blockquote> </blockquote> . </blockquote> </blockquote> <div class="moz-signature">-- Kyprianos Papadimitriou, PhD School of Electrical & Computer Engineering Technical University of Crete GR 73100 Chania, Greece email: kpapadim(AT)mhl(DOT)tuc(DOT)gr url: <a href="http://users.isc.tuc.gr/%7Ekpapadimitriou">users.isc.tuc.gr/~kpapadimitriou</a> url: <a href="http://www.ece.tuc.gr/5990.html">www.ece.tuc.gr/5990.html</a> tel: (+30) 28210 37219 fax: (+30) 28210 37542 </div> </body> </html>