从 19.10 升级到 20.04 后，我自动删除了许多弃用的软件包。在 hplip 升级期间，我确认使用了维护者版本的配置文件。但在 Ubuntu 重启后，hp 1020 打印机停止打印。每次刷新窗口时，hplip 工具箱都会挂起。所以我彻底清除并卸载了 hplip。
使用安装本指南安装先前已安装的hplip 3.20.3版本。
所以我从这里对于 Ubuntu，使用权限对其进行 chmodx并运行它：./hplip-3.20.5.run。
它询问我是否要安装缺少的依赖项：
Package-Name Component Required/Optional
pyqt5-dbus gui_qt5 OPTIONAL
reportlab fax OPTIONAL
pyqt5 gui_qt5 REQUIRED
python-notify gui_qt5 OPTIONAL
我说y，但是，对于python-pyqt5包我得到了：
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
对于python-dbus.mainloop.pyqt5包：
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-dbus.mainloop.pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
对于python-notify包：
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-notify'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
为了python-reportlab：
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-reportlab'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
我跳过了这些软件包的安装，因为无法安装它们。最后，我得到了以下错误：
warning: Some HPLIP functionality might not function due to missing package(s).
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.
RUNNING POST-PACKAGE COMMANDS
-----------------------------
OK
RE-CHECKING DEPENDENCIES
------------------------
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.
error: Installation cannot continue without this dependency.
error: Please manually install this dependency and re-run this installer.
我也hplip-3.20.5-plugin.run从这里
$ bash hplip-3.20.5-plugin.run
Verifying archive integrity... All good.
Uncompressing HPLIP 3.20.5 Plugin Self Extracting Archive..............................................................
Error setting home directory: /etc/hp/hplip.conf not found. Is HPLIP installed?
Universe/Multiverse 存储库已启用，但是：
$ apt-cache search python-pyqt5
python-pyqt5.qwt-doc - Python Qwt6 technical widget library, documentation and examples
$ apt-cache search python-reportlab
python-reportlab-doc - Documentation for the ReportLab Python library (PDF format)
$ apt-cache search python-dbus.mainloop.pyqt5
$ apt-cache search python-notify
python3-notify2 - desktop notifications API for Python 3
软件包python3-pyqt5、、、python3-reportlab已安装并且python3-notify2是。python3-dbus.mainloop.pyqt5already the newest version
我还可以看到，例如，python-pyqt5包在 19.10 存储库中可用，但此包需要的qtbase-abi-5-12-4包在 eoan 的存储库中不存在。18.04 的python-pyqt5包需要不同的 qtbase-abi 包，而 bionic 的存储库中不存在该包。
这是否意味着 phlip-3.20.5 与 20.04 不兼容，或者可能存在一些包含这四个包及其依赖项的附加存储库？
更新：
已安装
hplip、、hplip-data包hplip-gui。从启动器启动 hplip-gui
收到登录信息
journalctl -f：Jun 07 23:14:13 ubuntu hplip.desktop[17823]: error: Unable to locate models.dat file Jun 07 23:14:13 ubuntu /hp-toolbox[17823]: [17823]: error: Unable to locate models.dat file Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Linux Imaging and Printing System (ver. 0.0.0) Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Device Manager ver. 15.0 Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Copyright (c) 2001-18 HP Development Company, LP Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This software comes with ABSOLUTELY NO WARRANTY. Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This is free software, and you are welcome to distribute it Jun 07 23:14:13 ubuntu hplip.desktop[17823]: under certain conditions. See COPYING file for more details. Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Traceback (most recent call last): Jun 07 23:14:13 ubuntu hplip.desktop[17823]: File "/usr/bin/hp-toolbox", line 269, in <module> Jun 07 23:14:13 ubuntu hplip.desktop[17823]: QApplication, ui_package = utils.import_dialog(ui_toolkit) Jun 07 23:14:13 ubuntu hplip.desktop[17823]: TypeError: cannot unpack non-iterable NoneType object
hplip-gui尚未启动：桌面上没有任何内容。
较新hplip-3.20.6也不支持 Ubuntu 20.04。
答案1
事实上，在 Ubuntu 20.04 上使用 hplip-3.20.6 会遇到一些麻烦。安装时会抱怨 pyqt5。我的解决方法是使用自定义选项（而不是自动）安装 hplib-3.20.6。您可以在没有 qt 支持的情况下安装 hplib（没有：图形用户界面（Qt5））。请在终端中运行：
./hplip-3.20.6.run
现在您可以选择自定义安装并禁用 qt5：
Do you wish to enable 'Graphical User Interfaces (Qt5)' (y=yes*, n=no, q=quit) ? n
你得到：
INSTALLATION MODE
-----------------
Automatic mode will install the full HPLIP solution with the most common options.
Custom mode allows you to choose installation options to fit specific requirements.
Please choose the installation mode (a=automatic*, c=custom, q=quit) : c
INTRODUCTION
------------
This installer will install HPLIP version 3.20.6 on your computer.
Please close any running package management systems now (YaST, Adept, Synaptic, Up2date, etc).
DISTRO/OS CONFIRMATION
----------------------
Distro appears to be Ubuntu 20.04.
Is "Ubuntu 20.04" your correct distro/OS and version (y=yes*, n=no, q=quit) ? y
DRIVER OPTIONS
--------------
Would you like to install Custom Discrete Drivers or Class Drivers ( 'd'= Discrete Drivers*,'c'= Class Drivers,'q'= Quit)? : d
Initializing. Please wait...
SELECT HPLIP OPTIONS
--------------------
You can select which HPLIP options to enable. Some options require extra dependencies.
Do you wish to enable 'Network/JetDirect I/O' (y=yes*, n=no, q=quit) ? y
Do you wish to enable 'Graphical User Interfaces (Qt5)' (y=yes*, n=no, q=quit) ? n
Do you wish to enable 'PC Send Fax support' (y=yes*, n=no, q=quit) ? y
Do you wish to enable 'Scanning support' (y=yes*, n=no, q=quit) ? y
Do you wish to enable 'HPLIP documentation (HTML)' (y=yes*, n=no, q=quit) ? y
我希望这个评论是有用的，问候。
答案2
有一个解决方案，花了一段时间。我刚刚用 Qt5 编译了 hplip 3.20.9。并使用以下讨论提示来解决 python-PyQt5 缺少依赖项：https://answers.launchpad.net/hplip/+question/691141 现在打印机似乎开始与 Ubuntu 20.04 配合使用。
HP Linux Imaging and Printing System (ver. 3.20.9)
Dependency/Version Check Utility ver. 15.1
Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
Note: hp-check can be run in three modes:
1. Compile-time check mode (-c or --compile): Use this mode before compiling the HPLIP supplied tarball (.tar.gz or .run) to determine if the proper dependencies are installed to successfully compile HPLIP.
2. Run-time check mode (-r or --run): Use this mode to determine if a distro supplied package (.deb, .rpm, etc) or an already built HPLIP supplied tarball has the proper dependencies installed to successfully run.
3. Both compile- and run-time check mode (-b or --both) (Default): This mode will check both of the above cases (both compile- and run-time dependencies).
Check types:
a. EXTERNALDEP - External Dependencies
b. GENERALDEP - General Dependencies (required both at compile and run time)
c. COMPILEDEP - Compile time Dependencies
d. [All are run-time checks]
PYEXT SCANCONF QUEUES PERMISSION
Status Types:
OK
MISSING - Missing Dependency or Permission or Plug-in
INCOMPAT - Incompatible dependency-version or Plugin-version
---------------
| SYSTEM INFO |
---------------
Kernel: 5.4.0-48-generic #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 GNU/Linux
Host: Kodibuntu
Proc: 5.4.0-48-generic #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 GNU/Linux
Distribution: 12 20.04
Bitness: 64 bit
-----------------------
| HPLIP CONFIGURATION |
-----------------------
HPLIP-Version: HPLIP 3.20.9
HPLIP-Home: /usr/share/hplip
HPLIP-Installation: Auto installation is supported for ubuntu distro 20.04 version
Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.
[hplip]
version=3.20.9
[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/HP
ppdbase=/usr/share/ppd
doc=/usr/share/doc/hplip-3.20.9
html=/usr/share/doc/hplip-3.20.9
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv/hp
bin=/usr/bin
apparmor=/etc/apparmor.d
# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
libusb01-build=no
pp-build=no
gui-build=yes
scanner-build=yes
fax-build=yes
dbus-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
hpijs-install=no
foomatic-drv-install=no
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.20.9
restricted-build=no
ui-toolkit=qt5
qt3=no
qt4=no
qt5=yes
policy-kit=no
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=no
class-driver=no
Current contents of '/var/lib/hp/hplip.state' file:
Plugins are not installed. Could not access file: No such file or directory
Current contents of '~/.hplip/hplip.conf' file:
[upgrade]
notify_upgrade = false
last_upgraded_time = 1518909741
pending_upgrade_time = 0
latest_available_version = 3.17.10
[settings]
systray_visible = 0
systray_messages = 0
[last_used]
device_uri = hp:/usb/Photosmart_7400_series?serial=CN53C2Z1HKUJ
printer_name = Photosmart_7400
working_dir = .
[commands]
scan = /usr/bin/xsane -V %SANE_URI%
[refresh]
rate = 30
enable = false
type = 1
[polling]
enable = false
interval = 5
device_list =
[fax]
voice_phone =
email_address =
[installation]
date_time = 10/06/20 02:33:45
version = 3.20.9
<Package-name> <Package-Desc> <Required/Optional> <Min-Version> <Installed-Version> <Status> <Comment>
-------------------------
| External Dependencies |
-------------------------
cups CUPS - Common Unix Printing System REQUIRED 1.1 2.3.1 OK 'CUPS Scheduler is running'
gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.50 OK -
xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.29 OK -
dbus DBus - Message bus system REQUIRED - 1.12.16 OK -
policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
network network -wget OPTIONAL - 1.20.3 OK -
avahi-utils avahi-utils OPTIONAL - 0.7 OK -
------------------------
| General Dependencies |
------------------------
libjpeg libjpeg - JPEG library REQUIRED - - OK -
cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - 2.3.1 OK -
cups-image CUPS image - CUPS image development files REQUIRED - 2.3.1 OK -
libpthread libpthread - POSIX threads library REQUIRED - b'2.31' OK -
libusb libusb - USB library REQUIRED - 1.0 OK -
sane SANE - Scanning library REQUIRED - - OK -
sane-devel SANE - Scanning library development files REQUIRED - - OK -
libavahi-dev libavahi-dev REQUIRED - - OK -
libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.8 OK -
libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.1 OK -
python3X Python 2.2 or greater - Python programming language REQUIRED 2.2 3.8.2 OK -
python3-notify2 Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
python3-pyqt5-dbus PyQt 5 DBus - DBus Support for PyQt5 OPTIONAL 5.0 5.14.1 OK -
python3-pyqt5 PyQt 5- Qt interface for Python (for Qt version 4.x) REQUIRED 5.0 5.14.1 OK -
python3-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.16 OK -
python3-xml Python XML libraries REQUIRED - 2.2.9 OK -
python3-devel Python devel - Python development files REQUIRED 2.2 3.8.2 OK -
python3-pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 7.0.0 OK -
python3-reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.5.34 OK -
--------------
| COMPILEDEP |
--------------
libtool libtool - Library building support services REQUIRED - 2.4.6 OK -
gcc gcc - GNU Project C and C++ Compiler REQUIRED - 9.3.0 OK -
make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.2.1 OK -
---------------------
| Python Extentions |
---------------------
cupsext CUPS-Extension REQUIRED - 3.20.9 OK -
hpmudext IO-Extension REQUIRED - 3.20.9 OK -
----------------------
| Scan Configuration |
----------------------
hpaio HPLIP-SANE-Backend REQUIRED - 3.20.9 OK 'hpaio found in /etc/sane.d/dll.conf'
scanext Scan-SANE-Extension REQUIRED - 3.20.9 OK -
答案3
尝试使用 pip 安装 pyqt5：
sudo apt install python-pip
pip install pyqt5
pip install pyqt5.sip
或者如果你的 hplip 版本需要 python3：
sudo apt install python3-pip
pip3 install pyqt5
pip3 install pyqt5.sip
答案4
总结一下之前提到的解决方案（来自 Bartosz），对我有用的是基本上将符号python链接更改为/usr/bin指向 Python 3 而不是 Python 2，如其中一个答案中所述https://answers.launchpad.net/hplip/+question/691141。
cd /usr/bin
sudo unlink python
sudo ln -s /usr/bin/python3 python