From https://bugs.launchpad.net/ubuntu/+source/appstream-glib/+bug/1780520/comments/2:
"I have uploaded a fixed package to my PPA: https://launchpad.net/~fmarier/+archive/ubuntu/ppa?field.series_filter=xenial
Here's how I fixed the problem:
1. upgrade the appstream-glib package to the one in my PPA 2. delete /var/cache/app-info/xmls/fwupd.xml 3. run `fwupdmgr refresh` as root to re-download the XML file"
This is the patch I added to the package: https://bugs.launchpad.net/ubuntu/+source/appstream-glib/+bug/1780520/+attachment/5161135/+files/06_ampersand_in_attribute_values.patch
From https:/ /bugs.launchpad .net/ubuntu/ +source/ appstream- glib/+bug/ 1780520/ comments/ 2:
"I have uploaded a fixed package to my PPA: https:/ /launchpad. net/~fmarier/ +archive/ ubuntu/ ppa?field. series_ filter= xenial
Here's how I fixed the problem:
1. upgrade the appstream-glib package to the one in my PPA app-info/ xmls/fwupd. xml
2. delete /var/cache/
3. run `fwupdmgr refresh` as root to re-download the XML file"
This is the patch I added to the package: https:/ /bugs.launchpad .net/ubuntu/ +source/ appstream- glib/+bug/ 1780520/ +attachment/ 5161135/ +files/ 06_ampersand_ in_attribute_ values. patch