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-rw-r--r--gnu/services/desktop.scm23
1 files changed, 23 insertions, 0 deletions
diff --git a/gnu/services/desktop.scm b/gnu/services/desktop.scm
index 9b3eb12613..1b087635d1 100644
--- a/gnu/services/desktop.scm
+++ b/gnu/services/desktop.scm
@@ -117,6 +117,9 @@
elogind-service
elogind-service-type
+ %gdm-file-system
+ gdm-file-system-service
+
%fontconfig-file-system
fontconfig-file-system-service
@@ -1232,6 +1235,13 @@ when they log out."
(flags '(read-only))
(check? #f)))
+(define %gdm-file-system
+ (file-system
+ (device "none")
+ (mount-point "/var/lib/gdm")
+ (type "tmpfs")
+ (check? #f)))
+
;; The global fontconfig cache directory can sometimes contain stale entries,
;; possibly referencing fonts that have been GC'd, so mount it read-only.
;; As mentioned https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36924#8 and
@@ -1240,6 +1250,15 @@ when they log out."
(simple-service 'fontconfig-file-system
file-system-service-type
(list %fontconfig-file-system)))
+
+;; Avoid stale caches and stale user IDs being reused between system
+;; reconfigurations, which would crash GDM and render the system unusable.
+;; GDM doesn't require persisting anything valuable there anyway.
+(define gdm-file-system-service
+ (simple-service 'gdm-file-system
+ file-system-service-type
+ (list %gdm-file-system)))
+
;;;
;;; AccountsService service.
@@ -1750,6 +1769,10 @@ applications needing access to be root.")
(list (file-append nfs-utils "/sbin/mount.nfs")
(file-append ntfs-3g "/sbin/mount.ntfs-3g"))))
+ ;; This is a volatile read-write file system mounted at /var/lib/gdm,
+ ;; to avoid GDM stale cache and permission issues.
+ gdm-file-system-service
+
;; The global fontconfig cache directory can sometimes contain
;; stale entries, possibly referencing fonts that have been GC'd,
;; so mount it read-only.