Thanks for your bug report. I can confirm that this happens when upgrading from a pre-upstart version.
Setting up acpid (1.0.6-9ubuntu6) ... * Stopping Hardware abstraction layer hald ...done. acpid start/running, process 21054 * Starting Hardware abstraction layer hald invoke-rc.d: initscript hal, action "start" failed. dpkg: error processing acpid (--configure): subprocess installed post-installation script returned error exit status 1
The reason is that hal has already been restarted (by upstart?) when the acpi.postinst tries to restart it.
Thanks for your bug report. I can confirm that this happens when upgrading from a pre-upstart version.
Setting up acpid (1.0.6-9ubuntu6) ...
* Stopping Hardware abstraction layer hald
...done.
acpid start/running, process 21054
* Starting Hardware abstraction layer hald
invoke-rc.d: initscript hal, action "start" failed.
dpkg: error processing acpid (--configure):
subprocess installed post-installation script returned error exit status 1
The reason is that hal has already been restarted (by upstart?) when the acpi.postinst tries to restart it.