I enabled widget.use-xdg-desktop-portal in about:config to use KDE file picker with firefox. With this setting on, printing is impossible from firefox I tried to print a: webpage single image pdf Actual results: Nothing. It didn't print. Expected results: It printed. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Archlinux (available in About System) KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.90 Qt Version: 5.15.2 ADDITIONAL INFORMATION System print dialogue is also unavailable disabling the widget.use-xdg-desktop-portal preference in firefox allows printing and it also shows gnome print dialogue Link to the firefox bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1746559
What exactly doesn't work? 1. The print dialog doesn't even appear at all when you go to File > Print 2. The print diapog appears, but when you click on its "Print" button, nothing is sent to the printer (its job queue remains empty) 3. A job gets sent to the printer, but it never starts
(In reply to Nate Graham from comment #1) > What exactly doesn't work? > > 1. The print dialog doesn't even appear at all when you go to File > Print > 2. The print diapog appears, but when you click on its "Print" button, > nothing is sent to the printer (its job queue remains empty) > 3. A job gets sent to the printer, but it never starts For me, the second happens. For the time being, I patched the use of portal printing out of thunderbird and firefox esr. And actually I am not sure whether this is a kde portal issue or a mozilla issue. I did, however, collect the following from .xsession-errors (this is from firefox-esr on debian/bullseye and it looks identical for thunderbird): (firefox-esr:7056): GLib-GObject-CRITICAL **: 23:32:51.400: g_object_ref: assertion 'G_IS_OBJECT (object)' failed file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/components/Highlight.qml:34:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... } qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 45843, resource id: 14698511, major code: 20 (GetProperty), minor code: 0 xdp-kde-print: Print called with parameters: xdp-kde-print: handle: "/org/freedesktop/portal/desktop/request/1_93/t" xdp-kde-print: app_id: "" xdp-kde-print: parent_window: "" xdp-kde-print: title: "Print" xdp-kde-print: fd: 23 xdp-kde-print: options: QMap() xdp-kde-print: Failed to print: no QPrinter what can be used for printing which seems to relate to https://github.com/KDE/xdg-desktop-portal-kde/blob/master/src/print.cpp#L212.
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I think the information reported is complete; I am not sure whether this is a bug in Firefox/Thunderbird with not using portal printing the way it should be used.
I have the same problem. With `GTK_USE_PORTAL=1 firefox`, KDE dialogs show up fine but printing fails with: > xdg-desktop-portal-kde[1583]: xdp-kde-print: Print called with parameters: > xdg-desktop-portal-kde[1583]: xdp-kde-print: handle: "/org/freedesktop/portal/desktop/request/1_125/t" > xdg-desktop-portal-kde[1583]: xdp-kde-print: app_id: "" > xdg-desktop-portal-kde[1583]: xdp-kde-print: parent_window: "" > xdg-desktop-portal-kde[1583]: xdp-kde-print: title: "Print" > xdg-desktop-portal-kde[1583]: xdp-kde-print: fd: 18 > xdg-desktop-portal-kde[1583]: xdp-kde-print: options: QMap() > xdg-desktop-portal-kde[1583]: xdp-kde-print: Failed to print: no QPrinter what can be used for printing With `GTK_USE_PORTAL=0 firefox`, printing works. Likely related to https://bugzilla.mozilla.org/show_bug.cgi?id=1746559
(In reply to nsane457 from comment #5) > I have the same problem. With `GTK_USE_PORTAL=1 firefox`, KDE dialogs show > up fine but printing fails with: > > > xdg-desktop-portal-kde[1583]: xdp-kde-print: Print called with parameters: > > xdg-desktop-portal-kde[1583]: xdp-kde-print: handle: "/org/freedesktop/portal/desktop/request/1_125/t" > > xdg-desktop-portal-kde[1583]: xdp-kde-print: app_id: "" > > xdg-desktop-portal-kde[1583]: xdp-kde-print: parent_window: "" > > xdg-desktop-portal-kde[1583]: xdp-kde-print: title: "Print" > > xdg-desktop-portal-kde[1583]: xdp-kde-print: fd: 18 > > xdg-desktop-portal-kde[1583]: xdp-kde-print: options: QMap() > > xdg-desktop-portal-kde[1583]: xdp-kde-print: Failed to print: no QPrinter what can be used for printing > > With `GTK_USE_PORTAL=0 firefox`, printing works. > > Likely related to https://bugzilla.mozilla.org/show_bug.cgi?id=1746559 It's literally linked in the bug report. So thanks for your +1