I plugged in my iphone into my usb port and got no connection, then I plugged it into another usb port and upower crashed. below is the dmesg log.
[ 249.000800] traps: upowerd[1710] general protection ip:7ffac40f31cb sp:7ffdad8ebeb0 error:0 in libc-2.21.so[7ffac4074000+1c0000]
[ 250.830414] panel-5-power-m[1753]: segfault at 8 ip 00007fe58fe5c6fa sp 00007ffc40ce3778 error 4 in libc-2.21.so[7fe58fdd1000+1c0000]
[ 255.001463] traps: upowerd[2037] general protection ip:7f11da00f693 sp:7ffc517d43d0 error:0 in libplist.so.3.0.0[7f11da009000+a000]
[ 255.764318] panel-5-power-m[2040]: segfault at 8 ip 00007ff6e0cf76fa sp 00007ffdf90df9d8 error 4 in libc-2.21.so[7ff6e0c6c000+1c0000]
[ 258.000892] traps: upowerd[2086] general protection ip:7fd25097c1cb sp:7ffe045442e0 error:0 in libc-2.21.so[7fd2508fd000+1c0000]
[ 263.782267] panel-5-power-m[2205]: segfault at 8 ip 00007f3086c2f6fa sp 00007ffd43f574e8 error 4 in libc-2.21.so[7f3086ba4000+1c0000]
[ 266.002118] traps: upowerd[2211] general protection ip:7f23d0f3f1cb sp:7ffc1b4a2b10 error:0 in libc-2.21.so[7f23d0ec0000+1c0000]
[ 273.784371] panel-5-power-m[2357]: segfault at 8 ip 00007fa697e5a6fa sp 00007fff80fb5d98 error 4 in libc-2.21.so[7fa697dcf000+1c0000]
[ 276.001565] traps: upowerd[2363] general protection ip:7f1591a971cb sp:7ffcd9dbdb60 error:0 in libc-2.21.so[7f1591a18000+1c0000]
[ 276.827205] panel-5-power-m[2401]: segfault at 8 ip 00007fc32e4f76fa sp 00007ffea2e4cc38 error 4 in libc-2.21.so[7fc32e46c000+1c0000]
[ 279.848223] panel-5-power-m[2453]: segfault at 8 ip 00007f67caf2a6fa sp 00007ffe2cca8958 error 4 in libc-2.21.so[7f67cae9f000+1c0000]
[ 284.001686] traps: upowerd[2501] general protection ip:7fd7125011cb sp:7ffe31685b20 error:0 in libc-2.21.so[7fd712482000+1c0000]
[ 287.001308] traps: upowerd[2538] general protection ip:7fa08e0641cb sp:7ffe1acc0ab0 error:0 in libc-2.21.so[7fa08dfe5000+1c0000]
[ 290.000986] traps: upowerd[2620] general protection ip:7f283691b1cb sp:7ffc7833ed70 error:0 in libc-2.21.so[7f283689c000+1c0000]
[ 293.000365] traps: upowerd[2742] general protection ip:7f9610bb91cb sp:7fffd83804c0 error:0 in libc-2.21.so[7f9610b3a000+1c0000]
[ 296.001657] traps: upowerd[2874] general protection ip:7f4c8ca461cb sp:7ffed229c480 error:0 in libc-2.21.so[7f4c8c9c7000+1c0000]
[ 305.001335] traps: upowerd[3308] general protection ip:7f92dd6da1cb sp:7ffe62057490 error:0 in libc-2.21.so[7f92dd65b000+1c0000]
[ 308.001320] traps: upowerd[3384] general protection ip:7fea523a81cb sp:7fff3de785a0 error:0 in libc-2.21.so[7fea52329000+1c0000]
[ 314.001036] traps: upowerd[3475] general protection ip:7fc37c7a61cb sp:7ffda5f5e630 error:0 in libc-2.21.so[7fc37c727000+1c0000]
[ 317.001537] traps: upowerd[3519] general protection ip:7f8da1f911cb sp:7ffdc042c440 error:0 in libc-2.21.so[7f8da1f12000+1c0000]
[ 325.390590] traps: upowerd[3556] general protection ip:7fd75cbb01cb sp:7ffddf371cb0 error:0 in libc-2.21.so[7fd75cb31000+1c0000]
[ 328.000949] traps: upowerd[3886] general protection ip:7f77012161cb sp:7fff096428f0 error:0 in libc-2.21.so[7f7701197000+1c0000]
[ 333.001386] traps: upowerd[4042] general protection ip:7f12bc7351cb sp:7ffea69256e0 error:0 in libc-2.21.so[7f12bc6b6000+1c0000]
[ 336.000552] traps: upowerd[4087] general protection ip:7fa0a39131cb sp:7ffd7c666d50 error:0 in libc-2.21.so[7fa0a3894000+1c0000]
[ 339.001602] traps: upowerd[4209] general protection ip:7f744fd241cb sp:7ffe3d033260 error:0 in libc-2.21.so[7f744fca5000+1c0000]
[ 342.001113] upowerd[4390]: segfault at 0 ip 00007faa9e668a1f sp 00007ffeec04c190 error 4 in libplist.so.3.0.0[7faa9e661000+a000]
[ 345.001387] traps: upowerd[4567] general protection ip:7f75ba9de1cb sp:7ffe69a21c00 error:0 in libc-2.21.so[7f75ba95f000+1c0000]
[ 350.001263] traps: upowerd[4642] general protection ip:7fb7050d01cb sp:7ffec44a7740 error:0 in libc-2.21.so[7fb705051000+1c0000]
[ 353.001649] traps: upowerd[4678] general protection ip:7fdceaa911cb sp:7ffcf03ce3b0 error:0 in libc-2.21.so[7fdceaa12000+1c0000]
[ 356.001052] traps: upowerd[4714] general protection ip:7f143c2a31cb sp:7ffc7c58d6f0 error:0 in libc-2.21.so[7f143c224000+1c0000]
[ 359.001678] traps: upowerd[4750] general protection ip:7f27b35371cb sp:7ffc4ed225f0 error:0 in libc-2.21.so[7f27b34b8000+1c0000]
[ 362.001725] traps: upowerd[4798] general protection ip:7fe75e24c1cb sp:7ffc21fd27a0 error:0 in libc-2.21.so[7fe75e1cd000+1c0000]
[ 365.001910] traps: upowerd[4834] general protection ip:7f1790f841cb sp:7fff418efaa0 error:0 in libc-2.21.so[7f1790f05000+1c0000]
[ 368.001326] traps: upowerd[4870] general protection ip:7fdeea8561cb sp:7ffd35dbea40 error:0 in libc-2.21.so[7fdeea7d7000+1c0000]
[ 375.001856] traps: upowerd[4978] general protection ip:7f9844af61cb sp:7ffe82bf2a30 error:0 in libc-2.21.so[7f9844a77000+1c0000]
[ 382.001762] traps: upowerd[5086] general protection ip:7f7896c651cb sp:7ffe1963da00 error:0 in libc-2.21.so[7f7896be6000+1c0000]
[ 385.001078] traps: upowerd[5122] general protection ip:7f77f6f8c1cb sp:7fff7d0fce80 error:0 in libc-2.21.so[7f77f6f0d000+1c0000]
[ 391.001939] traps: upowerd[5194] general protection ip:7fb8071371cb sp:7ffdb56a76d0 error:0 in libc-2.21.so[7fb8070b8000+1c0000]
[ 396.001385] traps: upowerd[5266] general protection ip:7f343cd121cb sp:7ffd58bcc720 error:0 in libc-2.21.so[7f343cc93000+1c0000]
[ 399.001108] traps: upowerd[5302] general protection ip:7f58db8b01cb sp:7ffd3bbd7030 error:0 in libc-2.21.so[7f58db831000+1c0000]
[ 402.002130] traps: upowerd[5338] general protection ip:7f3f4f7a81cb sp:7fff1cbb87b0 error:0 in libc-2.21.so[7f3f4f729000+1c0000]
[ 405.000969] traps: upowerd[5374] general protection ip:7f0b364a31cb sp:7ffebcbd1bd0 error:0 in libc-2.21.so[7f0b36424000+1c0000]
[ 408.001493] traps: upowerd[5410] general protection ip:7fe0e15c81cb sp:7ffd25d176f0 error:0 in libc-2.21.so[7fe0e1549000+1c0000]
[ 414.001111] traps: upowerd[5482] general protection ip:7f4c2568c1cb sp:7ffea8518300 error:0 in libc-2.21.so[7f4c2560d000+1c0000]
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: upower 0.99.3-1build1
ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0
Uname: Linux 4.2.0-7-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.18-0ubuntu9
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Sep 5 19:12:18 2015
InstallationDate: Installed on 2015-08-29 (7 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150825)
SourcePackage: upower
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.