Public bug reported: GDM doesn't start Xorg with `-listen tcp` when DisallowTCP=false is set in /etc/gdm3/custom.conf
Nine years ago with xorg-server 1.17 ago the `-nolisten tcp` option was reversed as a `-listen tcp`. Before, the behavior was to always enable tcp unless `-nolisten tcp` was set, now the behavior is to always disable tcp unless `-listen tcp` is set. To reverse the behaviour, GDM should be built with `HAVE_XSERVER_WITH_LISTEN` being defined, typically by passing `-DHAVE_XSERVER_WITH_LISTEN=1` to the compiler, as seen in the source: https://gitlab.gnome.org/GNOME/gdm/-/blob/08aea8002a2725f07a0889f52584d284648b2e82/daemon/gdm- server.c#L329 GDM modified its behaviour 8 years ago: https://gitlab.gnome.org/GNOME/gdm/-/commit/3f59fa0da5168451898db63e51e312ce894af0c1 and two years ago it was modified again: https://gitlab.gnome.org/GNOME/gdm/-/commit/bc16c9898012e463bc6b79c3faa8f81ed54527f7 Maybe this define was never added to the GDM build script? The web is full of forum threads of people trying to make GDM works with TCP listening, fail to get it working, and give up and use lightdm instead, this is probably because GDM was built without the expected define. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: gdm3 46.0-2ubuntu1 ProcVersionSignature: Ubuntu 6.8.0-44.44-generic 6.8.12 Uname: Linux 6.8.0-44-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: GNOME Date: Tue Oct 1 10:43:26 2024 RebootRequiredPkgs: Error: path contained symlinks. SourcePackage: gdm3 UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.default.apport: [modified] mtime.conffile..etc.default.apport: 2018-06-16T17:39:00.798346 mtime.conffile..etc.gdm3.custom.conf: 2024-10-01T10:43:20.322306 ** Affects: gdm3 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble third-party-packages ** Description changed: GDM doesn't start Xorg with `-listen tcp` when DisallowTCP=false is set in /etc/gdm3/custom.conf Nine years ago with xorg-server 1.17 ago the `-nolisten tcp` option was reversed as a `-listen tcp`. Before, the behavior was to always enable tcp unless `-nolisten tcp` was set, now the behavior is to always disable tcp unless `-listen tcp` is set. To reverse the behaviour, GDM should be built with `HAVE_XSERVER_WITH_LISTEN` being defined, typically by passing `-DHAVE_XSERVER_WITH_LISTEN=1` to the compiler, as seen in the source: https://gitlab.gnome.org/GNOME/gdm/-/blob/08aea8002a2725f07a0889f52584d284648b2e82/daemon/gdm- server.c#L329 - GDM modified its default behaviour 8 years ago: + GDM modified its behaviour 8 years ago: https://gitlab.gnome.org/GNOME/gdm/-/commit/3f59fa0da5168451898db63e51e312ce894af0c1 and two years ago it was modified again: https://gitlab.gnome.org/GNOME/gdm/-/commit/bc16c9898012e463bc6b79c3faa8f81ed54527f7 - Maybe this define was never added to GDM the build script? + Maybe this define was never added to the GDM build script? The web is full of forum threads of people trying to make GDM works with TCP listening, fail to get it working, and give up and use lightdm instead, this is probably because GDM was built without the expected define. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: gdm3 46.0-2ubuntu1 ProcVersionSignature: Ubuntu 6.8.0-44.44-generic 6.8.12 Uname: Linux 6.8.0-44-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: GNOME Date: Tue Oct 1 10:43:26 2024 RebootRequiredPkgs: Error: path contained symlinks. SourcePackage: gdm3 UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.default.apport: [modified] mtime.conffile..etc.default.apport: 2018-06-16T17:39:00.798346 mtime.conffile..etc.gdm3.custom.conf: 2024-10-01T10:43:20.322306 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2083310 Title: GDM doesn't start Xorg with `-listen tcp` when DisallowTCP=false is set in custom.conf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2083310/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
