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sddm: use tmpfiles.d to wipe QML cache

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This commit is contained in:
Peter Hoeg 2018-07-09 14:51:05 +08:00
parent 2a8a5533d1
commit cd4e54b3a1
1 changed files with 15 additions and 11 deletions
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26
nixos/modules/services/x11/display-managers/sddm.nix
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@ -19,17 +19,6 @@ let
Xsetup = pkgs.writeScript "Xsetup" ''
#!/bin/sh
# Prior to Qt 5.9.2, there is a QML cache invalidation bug which sometimes
# strikes new Plasma 5 releases. If the QML cache is not invalidated, SDDM
# will segfault without explanation. We really tore our hair out for awhile
# before finding the bug:
# https://bugreports.qt.io/browse/QTBUG-62302
# We work around the problem by deleting the QML cache before startup. It
# will be regenerated, causing a small but perceptible delay when SDDM
# starts.
rm -fr /var/lib/sddm/.cache/sddm-greeter/qmlcache
${cfg.setupScript}
'';
@ -285,5 +274,20 @@ in
# To enable user switching, allow sddm to allocate TTYs/displays dynamically.
services.xserver.tty = null;
services.xserver.display = null;
systemd.tmpfiles.rules = [
# Prior to Qt 5.9.2, there is a QML cache invalidation bug which sometimes
# strikes new Plasma 5 releases. If the QML cache is not invalidated, SDDM
# will segfault without explanation. We really tore our hair out for awhile
# before finding the bug:
# https://bugreports.qt.io/browse/QTBUG-62302
# We work around the problem by deleting the QML cache before startup.
# This was supposedly fixed in Qt 5.9.2 however it has been reported with
# 5.10 and 5.11 as well. The initial workaround was to delete the directory
# in the Xsetup script but that doesn't do anything.
# Instead we use tmpfiles.d to ensure it gets wiped.
# This causes a small but perceptible delay when SDDM starts.
"e ${config.users.users.sddm.home}/.cache - - - 0"
];
};
}