My printer scanner Hp officejet pro 7740 ran well on kubuntu 19.10. Recently, I upgraded to 20.04 LTS and could not use the scanner ADF from PC using simple-scan anymore. I tried to install hplip 3.20.6 from the hp website, but ran into dependency problems with pyQt4 and others. Then I did a fresh install, same situation. I run ``hp-setup`` on the command line and this gave the same errors as above twice:
error: Channel write error
error: Unable To read the XML data from device
error: Channel write error
error: Unable To read the XML data from device
After upgrading to 20.04, I haven't tried to install the latest version of hplip anymore.
My printer scanner Hp officejet pro 7740 ran well on kubuntu 19.10. Recently, I upgraded to 20.04 LTS and could not use the scanner ADF from PC using simple-scan anymore. I tried to install hplip 3.20.6 from the hp website, but ran into dependency problems with pyQt4 and others. Then I did a fresh install, same situation. I run ``hp-setup`` on the command line and this gave the same errors as above twice:
error: Channel write error
error: Unable To read the XML data from device
error: Channel write error
error: Unable To read the XML data from device
After upgrading to 20.04, I haven't tried to install the latest version of hplip anymore.