[Impact] Due to a problem in the Murrine engine, using bitmap fonts and Murrine-based themes at the same time might lead to crash of various GTK+2 apps. This issue was around for about 3-4 years, or maybe even more.
It affects a lot of Xfce and MATE users who choose to use bitmap fonts, and it's present in two current LTS releases, so it would be really nice to apply the fix there. The patch which is posted below fixes the crashes for good and allows people to use bitmap fonts and Murrine-based themes together again. [Test Case] Steps to reproduce: 1. Have Xubuntu (or Xfce in any other Ubuntu edition) installed. It can be any release from 14.04 to 16.10. 2. Install gtk2-engines-murrine, murrine-themes and shimmer-themes packages, if they're not installed. 3. Install some package with bitmap fonts, for example, xfonts-terminus. 4. Run xfce4-appearance-settings and select some Murrine-based theme, for example, Greybird or Murrine-Light. 5. Switch to the Fonts tab and select some bitmap font, for example, Terminus. 6. Exit xfce4-appearance-settings. Now some GTK+2 apps will crash right on start with the following error message: ../../../../src/cairo-scaled-font.c:459: _cairo_scaled_glyph_page_destroy: Assertion `!scaled_font->cache_frozen' failed. It's reproducible with mousepad, gimp, geany. With some Murrine-based themes, like Greybird, it's also reproducible with xfce4-panel and Xfce configuration apps: xfce4-appearance-settings, xfce4-mouse-settings, xfce4-session-settings, etc. It also affects some MATE apps, like mate-panel or mate-control-center. [Regression Potential] After several months of testing the fix in Debian Jessie and a few Ubuntu releases, I hadn't found any regressions. Since the patch is very small and it fixes all the crashes for good, I don't think there's much space for the regressions. [Other Info] Appearance settings being affected is a nasty thing. However, you can reset the font to default via the console tool: $ xfconf-query -c xsettings -p /Gtk/FontName -r The patch was made following the proposed solution at: https://bugs.freedesktop.org/show_bug.cgi?id=78787#c9 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gtk2-engines-murrine in Ubuntu. https://bugs.launchpad.net/bugs/1294699 Title: Xubuntu desktop crashes in call to cairo after setting fixed-width bitmap (pcf) GTK font Status in xfdesktop: New Status in gtk2-engines-murrine package in Ubuntu: Confirmed Status in terminator package in Ubuntu: Confirmed Status in Arch Linux: New Status in gtk2-engines-murrine package in Debian: Unknown Status in gtk2-engines-murrine package in Fedora: Unknown Bug description: Reproduce: In Xubuntu (xfce), go to Settings Manager -> Appearance -> Fonts -> Default Font, select an installed fixed-width, bitmapped .pcf font (e.g. ProFont). Desktop crashes; the new font does appear in the apport dialogs, but attempting to log back into the session, xfdesktop crashes with an assert in cairo, with gtk up the stacktrace: cairo-scaled-font.c:459: _cairo_scaled_glyph_page_destroy: Assertion `!scaled_font->cache_frozen' failed. To undo the change and be able to log in, I had to remove the GTK Font property in xfce4's xsettings.xml config file. It would be a fair limitation if certain bitmap fonts failed over gracefully or were disallowed for selection, however, allowing an the interface to select the font without error, and then crashing and hanging the session on every login, leaving the config in a bad state should be fixed. uname: 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux lsb_release: Distributor ID: Ubuntu Description: Ubuntu 13.10 Release: 13.10 Codename: saucy Similar report seen in archlinux/xfce4: https://bbs.archlinux.org/viewtopic.php?id=169433 ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: libgtk2.0-0 2.24.20-1ubuntu1 ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4 Uname: Linux 3.11.0-18-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 Date: Wed Mar 19 10:41:54 2014 InstallationDate: Installed on 2013-11-01 (138 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MarkForUpload: True SourcePackage: gtk+2.0 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/xfdesktop/+bug/1294699/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
