Hi all, Thanks a lot for all your advice, I can confirm that modemmanager 1.4.2 fixes the issue. You saved my week! :-) Kind regards, Erwin On Thu, Oct 22, 2015 at 9:13 PM, Bjørn Mork <bjorn@xxxxxxx> wrote: > Dan Williams <dcbw@xxxxxxxxxx> writes: >> On Thu, 2015-10-22 at 10:39 +0200, Erwin Van de Velde wrote: >>> Hi all, >>> >>> Thank you for your helpful answers! I have investigated it further, >>> stopping potential culprits in userspace and I have found the issue: >>> it is modemmanager that seems to keep the devices open somewhere and >>> thus causes the ttyUSB numbers to go up. So now I will redirect the >>> issue to their developers :-) >> >> There was a bug between ModemManager 1.2 and 1.4.2 that could have >> triggered this, which was fixed in commit >> 009af02f6d06d5020e397455354b9ccc56557b02. So make sure you have 1.4.2 >> (released on 13-Jan-2015) or later. > > Yes, unfortunately that includes the current Debian stable version: > > nemi:/home/bjorn# apt-cache policy modemmanager > modemmanager: > Installed: 1.4.0-1 > Candidate: 1.4.0-1 > Version table: > 1.4.12-1 0 > 600 http://ftp.no.debian.org/debian/ sid/main amd64 Packages > *** 1.4.0-1 0 > 700 http://ftp.no.debian.org/debian/ jessie/main amd64 Packages > 100 /var/lib/dpkg/status > > > nemi:/home/bjorn# lsof -p8191|grep /dev > ModemMana 8191 root 0u CHR 136,14 0t0 17 /dev/pts/14 > ModemMana 8191 root 1u CHR 136,14 0t0 17 /dev/pts/14 > ModemMana 8191 root 2u CHR 136,14 0t0 17 /dev/pts/14 > ModemMana 8191 root 9u CHR 180,0 0t0 1091872 /dev/cdc-wdm0 > ModemMana 8191 root 10u CHR 166,0 0t0 9804 /dev/ttyACM0 (deleted) > ModemMana 8191 root 11u CHR 166,1 0t0 397155 /dev/ttyACM1 (deleted) > ModemMana 8191 root 12u CHR 166,2 0t0 448536 /dev/ttyACM2 (deleted) > ModemMana 8191 root 13u CHR 166,3 0t0 507569 /dev/ttyACM3 (deleted) > ModemMana 8191 root 14u CHR 166,4 0t0 673258 /dev/ttyACM4 (deleted) > ModemMana 8191 root 15u CHR 166,5 0t0 922024 /dev/ttyACM5 (deleted) > > > I must admit that I have known about this, but have been too lazy to > report it against the Debian package. It doesn't cause any real > problems for me, even if I sometimes do large numbers of modem > plug/unplug cycles. I just restart ModemManager if I find the device > numbers too high :) > > > > Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
