I also confirm this. Here are my messages, which are a little different: ~$ dmesg |tail -n 60 [ 114.220089] usb 1-1.4: device descriptor read/64, error -32 [ 114.420093] usb 1-1.4: device descriptor read/64, error -32 [ 114.528302] usb 1-1-port4: attempt power cycle [ 115.156055] usb 1-1.4: new full-speed USB device number 16 using xhci_hcd [ 115.156177] usb 1-1.4: Device not responding to setup address. [ 115.364128] usb 1-1.4: Device not responding to setup address. [ 115.572019] usb 1-1.4: device not accepting address 16, error -71 [ 115.664021] usb 1-1.4: new full-speed USB device number 17 using xhci_hcd [ 115.664129] usb 1-1.4: Device not responding to setup address. [ 115.876154] usb 1-1.4: Device not responding to setup address. [ 116.084017] usb 1-1.4: device not accepting address 17, error -71 [ 116.084289] usb 1-1-port4: unable to enumerate USB device [ 116.107176] usbcore: registered new interface driver r8152 [ 116.114216] usbcore: registered new interface driver cdc_ether [ 116.813530] usb 1-1.3: USB disconnect, device number 13 [ 159.204122] r8152 1-1.3:1.0 (unnamed net_device) (uninitialized): Get ether addr fail [ 159.204998] r8152 1-1.3:1.0 eth0: v1.09.9 [ 159.484438] usb 1-1.3: new high-speed USB device number 18 using xhci_hcd [ 159.601037] usb 1-1.3: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=30.00 [ 159.601040] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 159.601042] usb 1-1.3: Product: USB 10/100/1000 LAN [ 159.601043] usb 1-1.3: Manufacturer: Realtek [ 159.601044] usb 1-1.3: SerialNumber: 00E04C360518 [ 160.404159] usb 1-1.4: new full-speed USB device number 19 using xhci_hcd [ 160.496162] usb 1-1.4: device descriptor read/64, error -32 [ 160.700444] usb 1-1.4: device descriptor read/64, error -32 [ 160.904166] usb 1-1.4: new full-speed USB device number 20 using xhci_hcd [ 161.000162] usb 1-1.4: device descriptor read/64, error -32 [ 161.200095] usb 1-1.4: device descriptor read/64, error -32 [ 161.312417] usb 1-1-port4: attempt power cycle [ 161.948169] usb 1-1.4: new full-speed USB device number 21 using xhci_hcd [ 161.948422] usb 1-1.4: Device not responding to setup address. [ 162.156263] usb 1-1.4: Device not responding to setup address. [ 162.364267] usb 1-1.4: device not accepting address 21, error -71 [ 162.466728] usb 1-1.4: new full-speed USB device number 22 using xhci_hcd [ 162.466887] usb 1-1.4: Device not responding to setup address. [ 162.672130] usb 1-1.4: Device not responding to setup address. [ 162.884049] usb 1-1.4: device not accepting address 22, error -71 [ 162.884340] usb 1-1-port4: unable to enumerate USB device [ 162.887992] usb 1-1.3: USB disconnect, device number 18 [ 202.868108] r8152 1-1.3:1.0 (unnamed net_device) (uninitialized): Get ether addr fail [ 202.869288] r8152 1-1.3:1.0 eth0: v1.09.9 [ 203.144160] usb 1-1.3: new high-speed USB device number 23 using xhci_hcd [ 203.262058] usb 1-1.3: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=30.00 [ 203.262068] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 203.262075] usb 1-1.3: Product: USB 10/100/1000 LAN [ 203.262081] usb 1-1.3: Manufacturer: Realtek [ 203.262087] usb 1-1.3: SerialNumber: 00E04C360518 [ 203.360240] usb 1-1.3: reset high-speed USB device number 23 using xhci_hcd [ 203.522147] r8152 1-1.3:1.0 eth0: v1.09.9 [ 203.679129] r8152 1-1.3:1.0 enx00e04c360518: renamed from eth0 [ 203.718142] IPv6: ADDRCONF(NETDEV_UP): enx00e04c360518: link is not ready [ 203.725363] IPv6: ADDRCONF(NETDEV_UP): enx00e04c360518: link is not ready [ 217.154020] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04c360518: link becomes ready [ 217.154874] r8152 1-1.3:1.0 enx00e04c360518: carrier on [ 231.020526] usb usb2-port1: config error [ 357.438749] webcamoid[5831]: segfault at 10 ip 00007f902210cec3 sp 00007ffd31780ff0 error 4 in libQt5Core.so.5.11.1[7f9021ef7000+2e9000] [ 357.438755] Code: 50 10 48 89 50 18 48 89 48 20 48 89 50 28 48 89 43 30 eb 8a 90 66 90 55 48 89 e5 41 56 41 54 53 48 89 fb 48 89 f7 48 83 ec 58 <0f> b7 4e 10 64 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 66 83 f9 [ 490.374445] webcamoid[6082]: segfault at 10 ip 00007ff7fe09cec3 sp 00007ffc756add90 error 4 in libQt5Core.so.5.11.1[7ff7fde87000+2e9000] [ 490.374450] Code: 50 10 48 89 50 18 48 89 48 20 48 89 50 28 48 89 43 30 eb 8a 90 66 90 55 48 89 e5 41 56 41 54 53 48 89 fb 48 89 f7 48 83 ec 58 <0f> b7 4e 10 64 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 66 83 f9
And here is the gdb output: ~$ gdb webcamoid GNU gdb (Ubuntu 8.2-0ubuntu1) 8.2 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from webcamoid...(no debugging symbols found)...done. (gdb) run Starting program: /usr/bin/webcamoid [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7fffefe4f700 (LWP 4672)] [New Thread 0x7fffed3b3700 (LWP 4676)] [New Thread 0x7fffecbb2700 (LWP 4677)] [New Thread 0x7fffdffff700 (LWP 4680)] [New Thread 0x7fffdf7fe700 (LWP 4684)] Thread 1 "webcamoid" received signal SIGSEGV, Segmentation fault. 0x00007ffff6663ec3 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (gdb) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766143 Title: webcamoid segfaults (error 4 in libQt5Core.so.5.9.5) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/webcamoid/+bug/1766143/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
