Ah, a month too late. Upgraded the machine to Xubuntu 16.04 a few weeks ago, and the problem seems to have vanished, and it now natively recognizes the touchpad. So I guess mark as resolved.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1443485 Title: xserver-xorg crash, probably synaptics Status in xorg package in Ubuntu: Incomplete Bug description: Ubuntu 14.04 LTS with xserver-xorg-lts-utopic and linux-generic-lts- utopic installed to even make touchpad work. The system can run for days without any problems, but sooner or later a spontaneous segfault will happen and return to the login screen. xserver-xorg-lts-utopic 1:7.7+7ubuntu2~trusty1 xserver-xorg-input-synaptics-lts-utopic 1.8.1-1ubuntu1~trusty1 Xorg launch log: http://codepad.org/COKiZYof X.Org X Server 1.16.0 Release Date: 2014-07-16 [226151.797] Current Operating System: Linux nitro 3.16.0-34-generic #45~14.04.1-Ubuntu SMP Tue Mar 24 11:14:29 UTC 2015 x86_64 [226151.797] Kernel command line: BOOT_IMAGE=/vmlinuz-3.16.0-34-generic.efi.signed root=UUID=0046f2da-0cf6-40a5-bb01-dbda4a8371cb ro rootflags=subvol=@ resume=UUID=d48c1651-fdab-41de-895c-0d5b9e50a1f9 [226151.797] Build Date: 12 February 2015 11:11:26PM [226151.797] xorg-server 2:1.16.0-1ubuntu1.2~trusty2 Xorg segfault log: http://codepad.org/n1EcjwJY [226115.806] (EE) Backtrace: [226115.809] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7f85b9765ed8] [226115.810] (EE) 1: /usr/bin/X (0x7f85b95c1000+0x1a8f19) [0x7f85b9769f19] [226115.810] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f85b7741000+0x36d40) [0x7f85b7777d40] [226115.810] (EE) 3: /usr/bin/X (0x7f85b95c1000+0x7a880) [0x7f85b963b880] [226115.810] (EE) 4: /usr/bin/X (0x7f85b95c1000+0x7a8da) [0x7f85b963b8da] [226115.810] (EE) 5: /usr/bin/X (0x7f85b95c1000+0x136e49) [0x7f85b96f7e49] [226115.810] (EE) 6: /usr/bin/X (0x7f85b95c1000+0x15efc9) [0x7f85b971ffc9] [226115.810] (EE) 7: /usr/bin/X (mieqProcessDeviceEvent+0x199) [0x7f85b97480e9] [226115.812] (EE) 8: /usr/bin/X (mieqProcessInputEvents+0xf7) [0x7f85b9748227] [226115.813] (EE) 9: /usr/bin/X (ProcessInputEvents+0x9) [0x7f85b9651d09] [226115.813] (EE) 10: /usr/bin/X (0x7f85b95c1000+0x533e2) [0x7f85b96143e2] [226115.813] (EE) 11: /usr/bin/X (0x7f85b95c1000+0x574ea) [0x7f85b96184ea] [226115.813] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f85b7762ec5] [226115.813] (EE) 13: /usr/bin/X (0x7f85b95c1000+0x42a5e) [0x7f85b9603a5e] [226115.813] (EE) [226115.848] (EE) Segmentation fault at address 0x7f850000000a Xorg's log also gets filled up with these messages http://codepad.org/dLKc2JJo which makes me suspect Synaptics is to blame for the eventual segfault: (EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)' (EE) BUG: ../../src/synaptics.c:2991 in UpdateTouchState() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1443485/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
