突然之间u盘加在不了，升级也会升不了……

[uil]

u盘突然之间不能加载显示：
无法挂载位置
错误 org.freedesktop.Hal.Device.UnknownError

想到可能是指升级的问题（下了300MB的升级包）

结果一升，出现：
无法计算更新

An unresolvable problem occurred while calculating the upgrade:
必要的软件包'mktemp'被标记为移除。

This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu

很可能发生了一个传输问题，请一会儿重试。

mktemp查看了一下，存在……

[uil]

用dmesg提示：

uil@uil:~$ dmesg | tail
[ 677.017821] sd 3:0:0:1: [sdb] 3444736 512-byte hardware sectors: (1.76 GB/1.64 GiB)
[ 677.018684] sd 3:0:0:1: [sdb] Write Protect is off
[ 677.018690] sd 3:0:0:1: [sdb] Mode Sense: 23 00 00 00
[ 677.018695] sd 3:0:0:1: [sdb] Assuming drive cache: write through
[ 677.021154] sd 3:0:0:1: [sdb] 3444736 512-byte hardware sectors: (1.76 GB/1.64 GiB)
[ 677.021932] sd 3:0:0:1: [sdb] Write Protect is off
[ 677.021938] sd 3:0:0:1: [sdb] Mode Sense: 23 00 00 00
[ 677.021942] sd 3:0:0:1: [sdb] Assuming drive cache: write through
[ 677.021951] sdb:
[ 677.242302] hal-storage-mou[4649]: segfault at 0 ip 0804a9ea sp bfc5cef0 error 4 in hal-storage-mount[8048000+7000]