问题[sane](ubuntu)

启动后，我的 journalctl 中连续出现以下错误：

colord-sane[4901]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
colord-sane[4901]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
colord-sane[4901]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
colord-sane[4901]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
colord-sane[4901]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied

我不知道它是否与这篇文章有关，但权限被拒绝问题看起来非常相似。我尝试通过这些步骤寻找 saned 和 colord-sane 之间的相似之处，但不确定要将哪个用户添加到哪个文件，或者需要将它添加到哪个组。

我今天升级到 Ubuntu 20.04，在升级过程中选择 LightDM 而不是 gdm3。在升级过程中，有人问我是否要保留或替换/etc/sane.d/dll.conf文件。我决定保留它。

现在，在没有主动重启的情况下，出现了“哦，不！出了点问题”屏幕。

由于我对这种故障排除仍然缺乏经验，我觉得只尝试从没有完全相同的“历史”的其他线程中的答案是不安全的。

我阅读的解决方案包括 Ctrl++并尝试登录并从命令行获取更多信息（哦不！重启时出现问题Alt）。F4

这样做安全吗？理想情况下，我想在尝试修复错误之前保存存储在加密硬盘上的数据。我想避免重新安装操作系统。

通过阅读其他帖子，我知道这篇文章可能会被批评为不够精确或尝试不够，但实际上我自己无法从那个白屏中获取更多信息，也不想为了提供更多信息而冒险破坏一切...

谢谢您的帮助！！:)

编辑：我不知道问题是否与 lvm2-activation-generator 有关，如从 19.04 更新后的 Ubuntu 19.10 “出现问题” 此解决方案和其他解决方案包括从实时 USB 启动。我可以通过在这个阶段简单地关闭笔记本电脑来“安全”地做到这一点吗？我必须先做某事吗？

我尝试按照本教程使用 SANE 设置网络扫描仪：Sane Daemon Tutorial

但是，如果我尝试在客户端上添加扫描仪，它就无法正常工作，无法访问 USB 端口。

Feb  9 18:55:47 druckserver systemd[1]: Started Scanner Service  (10.1.20.25:50515).
Feb  9 18:55:47 druckserver saned[2005]: saned (AF-indep+IPv6+systemd) from sane-backends 1.0.27 starting up
Feb  9 18:55:47 druckserver saned[2005]: check_host: access by remote host: ::ffff:10.1.20.25
Feb  9 18:55:47 druckserver systemd-resolved[1172]: Using degraded feature set (UDP) for DNS server 10.1.10.1.
Feb  9 18:55:52 druckserver saned[2005]: init: access granted to User@::ffff:10.1.20.25
Feb  9 18:55:57 druckserver saned[2005]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
Feb  9 18:55:57 druckserver saned[2005]: message repeated 3 times: [ io/hpmud/musb.c 2101: Invalid usb_open: Permission denied]
Feb  9 18:55:57 druckserver saned[2005]: saned exiting
Feb  9 18:56:35 druckserver systemd[1]: Started Scanner Service (10.1.20.25:50531).
Feb  9 18:56:35 druckserver saned[2013]: saned (AF-indep+IPv6+systemd) from sane-backends 1.0.27 starting up
Feb  9 18:56:35 druckserver saned[2013]: check_host: access by remote host: ::ffff:10.1.20.25
Feb  9 18:56:35 druckserver saned[2013]: init: access granted to User@::ffff:10.1.20.25
Feb  9 18:56:41 druckserver saned[2013]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
Feb  9 18:56:41 druckserver saned[2013]: message repeated 3 times: [ io/hpmud/musb.c 2101: Invalid usb_open: Permission denied]
Feb  9 18:56:41 druckserver saned[2013]: saned exiting

从这个系统日志中弹出的是这一行：

Feb  9 18:56:41 druckserver saned[2013]: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied

我完全不知道如何解决这个问题。我需要将用户“理智”添加到特定组吗？

谢谢你的帮助。

我有一台旧的Canon LiDE 90 扫描仪，它在 Windows 7 下没有问题。目前我正在从 Windows (7) 切换到 Ubuntu (18.10)。我的问题之一是我无法在 Ubuntu 中使用我的扫描仪。当我将此扫描仪连接到 Ubuntu 时，Ubuntu 附带的扫描仪软件无法识别它。我知道 Linux 中的 Sane 项目不支持我的扫描仪：http: //www.sane-project.org/unsupported/canon-lide-90.html

我尝试在Wine下使用它，但我无法安装 Windows 驱动程序和扫描仪随附的应用程序软件：两者在安装过程中都会出错。

此扫描仪的lsusb输出是：

Bus 001 Device 006: ID 04a9:1900 Canon, Inc. CanoScan LiDE 90

命令输出的与此设备相关的最后几行sane-find-scanner -v -v如下所示：

<This USB chip looks like a GL842 (result from sane-backends 1.0.27)>

found USB scanner (vendor=0x04a9 [Canon], product=0x1900 [CanoScan], chip=GL842) at libusb:001:006

有什么我可以使用的解决方法吗？

好的，所以这个 MFP 很古老，但它是一个主力，我的仍然像冠军一样运行。1135n 打印机驱动程序有效，但我无法通过简单扫描找到扫描仪。我的设备位于我的家庭网络 192.168.1.60。帮助！

我有一个 Brother 一体机系统 (MFC-J4420DW)。我安装了它的驱动程序，我可以从 Ubuntu 16.04 打印。但是，当我尝试扫描（使用简单扫描）时，没有检测到扫描仪。

我运行了 Brother 的诊断工具：

sudo brsaneconfig4 -d

并得到，除其他信息：

# No USB scanners found. If you expected something different, make sure that
# you have loaded a kernel driver for your USB host controller and have setup
# the USB system correctly. See man sane-usb for details.

我不明白这个消息。我查看了 man sane-usb 但看到的说明可能已经过时（例如 libusb 至少应该是 0.1.6 版本。我有 2:1.0.20-1）。

如何帮助 Ubuntu 检测我的 USB 扫描仪？

lsusb 和 sane-find-scanner 的输出如下：

janos@AndrasXubuntu:~/Desktop$ sane-find-scanner

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
could not open USB device 0x1d6b/0x0001 at 002:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 001:001: Access denied (insufficient permissions)
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.
janos@AndrasXubuntu:~/Desktop$ scanimage -L
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$

附加信息：

(1)gscan2pdf并xsane有同样的问题 - 找不到设备

(2) 当我有 xubuntu 12.04 扫描仪工作时

(3) 如果我连接我的笔记本电脑（与台式机相同的 Ubuntu 16.04，但笔记本电脑是 64 位，台式机是 32 位），那么在笔记本电脑上进行简单扫描即可。

Sudo 输出，请参阅下面 janos 的评论

janos@AndrasXubuntu:~/Desktop$ sudo sane-find-scanner
[sudo] password for janos: 

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.
janos@AndrasXubuntu:~/Desktop$ sudo scanimage -L
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$ 

lsusb 的输出（对不起，我的意思是在我第一次提出问题时将其包括在内）

janos@AndrasXubuntu:~/Desktop$ sudo lsusb
[sudo] password for janos: 
Bus 002 Device 002: ID 03f0:1205 Hewlett-Packard ScanJet 4500C/5550C
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
janos@AndrasXubuntu:~/Desktop$ 

请注意，如果我将扫描仪插入不同的 USB 插座（例如 Bus 001 中的插座）lsusb会在那里找到它，但简单扫描仍然无法工作。

附加信息：我可以将这台机器双引导到旧安装的 Fedora-3。扫描仪在那里工作。但是，scanimage -L不会找到它，lsusb并且sane-find-scanner会。请参见 Fedora-3 引导中终端的以下输出。

[apu@andraslinux ~]$ su -c "scanimage -L"
Password: 

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
[apu@andraslinux ~]$ /sbin/lsusb
Bus 002 Device 002: ID 03f0:1205 Hewlett-Packard 
Bus 002 Device 001: ID 1d6b:0001  
Bus 001 Device 001: ID 1d6b:0001  
[apu@andraslinux ~]$ sane-find-scanner 

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

可能是libusb使 FC3 能够运行扫描仪但 Ubuntu 16.04 可能无法使用libusb？

正如我之前提到的扫描仪确实在 12.04 上工作，但在升级到 14.04 和现在到 16.04 后停止工作

关于 libusb 的附加信息：

32 位台式机（扫描仪不工作）和 64 位笔记本电脑（扫描仪工作）的终端输出相同，如下所示：

janos@acerlinux:~/Desktop$ dpkg -l libusb
dpkg-query: no packages found matching libusb

事实上，我刚刚检查了我的 64 位笔记本电脑没有 libsane-dev，然后再次检查，如果连接到 leptop，扫描仪可以工作。

从以下评论中复制的其他信息：

/etc/sane.d/dll.conf还可以，hp5590 没有评论；然后我/etc/sane.d/hp5400.conf通过添加正确的 USB 线进行修改；扫描仪即使scanimage -L检测到它仍然无法工作，但报告为忙。看这里：

janos@AndrasXubuntu:~/Desktop$ sudo scanimage -L
[sudo] password for janos: 
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$ 

还有一件事，有趣的是，该/etc/sane.d/hp5400.conf文件在 64 位笔记本电脑和 32 位 Fc3 台式机上是相同的，无需编辑添加 5590 USB 线，但自 12.04 升级以来，除了 32 位 Ubuntu 台式机外，它们都可以与扫描仪一起使用。

因此，我认为最大的问题是“为什么 32 位 16.04 Ubuntu 桌面报告设备繁忙？”

附加信息 - libusb 的修订输出，这次带有星号：

32 位桌面上的 libusb

janos@AndrasXubuntu:~/Desktop$ dpkg -l libusb*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libusb-0.1-4:i 2:0.1.12-28  i386         userspace USB programming library
ii  libusb-1.0-0:i 2:1.0.20-1   i386         userspace USB programming library
un  libusb-dev     <none>       <none>       (no description available)
un  libusbmuxd-too <none>       <none>       (no description available)
ii  libusbmuxd4:i3 1.0.10-2ubun i386         USB multiplexor daemon for iPhone
janos@AndrasXubuntu:~/Desktop$

64位笔记本电脑上的libusb：

janos@acerlinux:~/Desktop$ dpkg -l libusb*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libusb-0.1-4:a 2:0.1.12-28  amd64        userspace USB programming library
ii  libusb-1.0-0:a 2:1.0.20-1   amd64        userspace USB programming library
ii  libusb-1.0-0:i 2:1.0.20-1   i386         userspace USB programming library
un  libusb-dev     <none>       <none>       (no description available)
un  libusbmuxd-too <none>       <none>       (no description available)
ii  libusbmuxd4:am 1.0.10-2ubun amd64        USB multiplexor daemon for iPhone
janos@acerlinux:~/Desktop$

附加信息：

根据我对 FC3 的注释，必须安装 man sane-usb usbfs 才能使扫描仪工作。所以在我的 FC3 中，我在 fstab 中有一行包含 none /proc/bus. 因此，我查看了 32 位 Ubuntu 和 64 位 Ubuntu 上安装的文件系统。请参阅下面的比较：

32 位 Ubuntudf -ha

janos@AndrasXubuntu:~/Desktop$ sudo df -ha
Filesystem      Size  Used Avail Use% Mounted on
sysfs              0     0     0    - /sys
proc               0     0     0    - /proc
udev            482M     0  482M   0% /dev
devpts             0     0     0    - /dev/pts
tmpfs           100M  5.1M   95M   6% /run
/dev/sda1       9.1G  4.0G  4.7G  47% /
securityfs         0     0     0    - /sys/kernel/security
tmpfs           500M  108K  500M   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           500M     0  500M   0% /sys/fs/cgroup
cgroup             0     0     0    - /sys/fs/cgroup/systemd
pstore             0     0     0    - /sys/fs/pstore
cgroup             0     0     0    - /sys/fs/cgroup/blkio
cgroup             0     0     0    - /sys/fs/cgroup/cpu,cpuacct
cgroup             0     0     0    - /sys/fs/cgroup/cpuset
cgroup             0     0     0    - /sys/fs/cgroup/net_cls,net_prio
cgroup             0     0     0    - /sys/fs/cgroup/freezer
cgroup             0     0     0    - /sys/fs/cgroup/memory
cgroup             0     0     0    - /sys/fs/cgroup/hugetlb
cgroup             0     0     0    - /sys/fs/cgroup/pids
cgroup             0     0     0    - /sys/fs/cgroup/perf_event
cgroup             0     0     0    - /sys/fs/cgroup/devices
systemd-1          0     0     0    - /proc/sys/fs/binfmt_misc
hugetlbfs          0     0     0    - /dev/hugepages
debugfs            0     0     0    - /sys/kernel/debug
mqueue             0     0     0    - /dev/mqueue
fusectl            0     0     0    - /sys/fs/fuse/connections
tmpfs           100M  4.0K  100M   1% /run/user/108
tmpfs           100M   36K  100M   1% /run/user/1000
gvfsd-fuse      0.0K  0.0K  0.0K    - /run/user/1000/gvfs
janos@AndrasXubuntu:~/Desktop$ 

在 FC3（扫描仪工作的地方）和 Ubuntu 之间比较 32 位桌面上的文件

janos@AndrasXubuntu:/media/janos/_1/etc/sane.d$ diff hp5400.conf /etc/sane.d/hp5400.conf
14c14
< #/dev/usb/scanner0
---
> #/dev/usbscanner
janos@AndrasXubuntu:/media/janos/_1/etc/sane.d$ 

64 位 Ubuntudf -ha

janos@acerlinux:~/Desktop$ sudo df -ha
[sudo] password for janos: 
Filesystem      Size  Used Avail Use% Mounted on
sysfs              0     0     0    - /sys
proc               0     0     0    - /proc
udev            1.4G     0  1.4G   0% /dev
devpts             0     0     0    - /dev/pts
tmpfs           276M  5.0M  271M   2% /run
/dev/sda5        17G  7.1G  8.5G  46% /
securityfs         0     0     0    - /sys/kernel/security
tmpfs           1.4G  260K  1.4G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           1.4G     0  1.4G   0% /sys/fs/cgroup
cgroup             0     0     0    - /sys/fs/cgroup/systemd
pstore             0     0     0    - /sys/fs/pstore
cgroup             0     0     0    - /sys/fs/cgroup/hugetlb
cgroup             0     0     0    - /sys/fs/cgroup/cpuset
cgroup             0     0     0    - /sys/fs/cgroup/pids
cgroup             0     0     0    - /sys/fs/cgroup/freezer
cgroup             0     0     0    - /sys/fs/cgroup/memory
cgroup             0     0     0    - /sys/fs/cgroup/cpu,cpuacct
cgroup             0     0     0    - /sys/fs/cgroup/devices
cgroup             0     0     0    - /sys/fs/cgroup/blkio
cgroup             0     0     0    - /sys/fs/cgroup/net_cls,net_prio
cgroup             0     0     0    - /sys/fs/cgroup/perf_event
systemd-1          -     -     -    - /proc/sys/fs/binfmt_misc
hugetlbfs          0     0     0    - /dev/hugepages
mqueue             0     0     0    - /dev/mqueue
debugfs            0     0     0    - /sys/kernel/debug
fusectl            0     0     0    - /sys/fs/fuse/connections
/dev/sda7       3.0G  1.3G  1.7G  44% /mnt/DOS_E
/dev/sda8        22G  6.1G   15G  30% /mnt/save
binfmt_misc        0     0     0    - /proc/sys/fs/binfmt_misc
tmpfs           276M   44K  276M   1% /run/user/1000
gvfsd-fuse      0.0K  0.0K  0.0K    - /run/user/1000/gvfs
janos@acerlinux:~/Desktop$

FC3df -ha

Filesystem            Size  Used Avail Use% Mounted on
/dev/hdb1              18G  7.0G   11G  41% /
none                     0     0     0   -  /proc
none                     0     0     0   -  /sys
none                     0     0     0   -  /dev/pts
none                  506M     0  506M   0% /dev/shm
none                     0     0     0   -  /proc/bus/usb
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
none                     0     0     0   -  /var/named/chroot/proc

FC3ls | grep hp5400.conf

hp5400.conf

FC3ls | grep hp 5550.conf没有输出。

因此，注意事项：（a）FC3 和 64 位 Ubuntu 笔记本电脑都没有 hp5550.conf 文件，但两台机器的扫描仪都可以工作，（b）而 32 位和 64 位 Ubuntu 都没有安装 usbfs 的扫描仪可以在 64 位 Ubuntu 上工作，但不能在 32 位 Ubuntu 上工作。

有关尝试建议包的附加信息：

janos@AndrasXubuntu:~/Desktop$ sudo dpkg -i libsane-dev_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb 
[sudo] password for janos: 
(Reading database ... 196333 files and directories currently installed.)
Preparing to unpack libsane-dev_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb ...
Unpacking libsane-dev (1.0.25+git20150528-1ubuntu2.16.04.1) over (1.0.25+git20150528-1ubuntu2) ...
dpkg: dependency problems prevent configuration of libsane-dev:
 libsane-dev depends on libsane (= 1.0.25+git20150528-1ubuntu2.16.04.1); however:
  Version of libsane:i386 on system is 1.0.25+git20150528-1ubuntu2.

dpkg: error processing package libsane-dev (--install):
 dependency problems - leaving unconfigured
Processing triggers for doc-base (0.10.7) ...
Processing 1 changed doc-base file...
Processing triggers for man-db (2.7.5-1) ...
Errors were encountered while processing:
 libsane-dev
janos@AndrasXubuntu:~/Desktop$ sudo dpkg -i libsane_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb 
[sudo] password for janos: 
(Reading database ... 196333 files and directories currently installed.)
Preparing to unpack libsane_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb ...
Unpacking libsane:i386 (1.0.25+git20150528-1ubuntu2.16.04.1) over (1.0.25+git20150528-1ubuntu2) ...
dpkg: dependency problems prevent configuration of libsane:i386:
 libsane:i386 depends on libsane-common (= 1.0.25+git20150528-1ubuntu2.16.04.1); however:
  Version of libsane-common on system is 1.0.25+git20150528-1ubuntu2.

dpkg: error processing package libsane:i386 (--install):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu7) ...
Errors were encountered while processing:
 libsane:i386
janos@AndrasXubuntu:~/Desktop$