Pues tras actualizar el sistema la ultima vez dejo de arrancar directamente.
[13110:13127:0413/233833:ERROR:object_proxy.cc(624)] Failed to get name owner. Got org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'org.chromium.Mtpd': no such name [13110:13127:0413/233833:ERROR:object_proxy.cc(624)] Failed to get name owner. Got org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'org.chromium.Mtpd': no such name [13110:13110:0413/233833:ERROR:extension_prefs.cc(1540)] Bad or missing pref 'version' for extension 'ahfgeienlihckogmohjhadlkjgocpleb' [13110:13127:0413/233833:ERROR:shared_memory_posix.cc(174)] Creating shared memory in /dev/shm/.org.chromium.Chromium.iMdNZ3 failed: Permiso denegado [13110:13127:0413/233833:ERROR:shared_memory_posix.cc(177)] Unable to access(W_OK|X_OK) /dev/shm: Permiso denegado [13110:13127:0413/233833:FATAL:shared_memory_posix.cc(179)] This is frequently caused by incorrect permissions on /dev/shm. Try 'sudo chmod 1777 /dev/shm' to fix.
Aunq ya no se si es los mismos errores que al principio por que intente después instalar de diferentes repositorios etc y el chrome tmb de primeras y tmp funcionaba, la verdad que no se por donde coger esto.