Re: Slow initialization of something during boot

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On 08/15/2013 01:58 PM, poma wrote:

5th:
cp /usr/lib/systemd/system/lightdm.service /etc/systemd/system
- add 10s delay in
/etc/systemd/system/lightdm.service
i.e.
…
[Service]
ExecStartPre=/usr/bin/sleep 10
ExecStart=/usr/sbin/lightdm
…

- enable it
i.e.
systemctl enable lightdm.service --force


If it works, and those 10s show as the only delay, you can try to lower
the value of it.


I've managed to produce a lag via NetworkManager disabled,

systemctl status NetworkManager
NetworkManager.service - Network Manager
    Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled)
    Active: inactive (dead)

These are the results of the application of the 'ExecStartPre' directive
in the 'lightdm.service'

====================================================
- default - no sleep
----------------------------------------------------
systemd-analyze blame
…
          30.903s lightdm.service
…
----------------------------------------------------
/var/log/lightdm/lightdm.log
…
[+0.04s] DEBUG: Launching X Server
…
[+30.87s] DEBUG: Greeter connected, display is ready
[+30.87s] DEBUG: New display ready, switching to it
[+30.87s] DEBUG: Activating VT 1
…
====================================================
- 10s sleep
/etc/systemd/system/lightdm.service
…
ExecStartPre=/usr/bin/sleep 10
…
----------------------------------------------------
systemd-analyze blame
…
          10.058s lightdm.service
…
----------------------------------------------------
/var/log/lightdm/lightdm.log
…
[+0.04s] DEBUG: Launching X Server
…
[+1.23s] DEBUG: Greeter connected, display is ready
[+1.23s] DEBUG: New display ready, switching to it
[+1.23s] DEBUG: Activating VT 1
…
====================================================
- 2s sleep
/etc/systemd/system/lightdm.service
…
ExecStartPre=/usr/bin/sleep 2
…
----------------------------------------------------
systemd-analyze blame
…
           2.146s lightdm.service
…
----------------------------------------------------
/var/log/lightdm/lightdm.log
…
[+0.12s] DEBUG: Launching X Server
…
[+2.88s] DEBUG: Greeter connected, display is ready
[+2.88s] DEBUG: New display ready, switching to it
[+2.88s] DEBUG: Activating VT 1
…
====================================================



With all due respect, I don't understand what's going on here---my network manager is not disabled. What effect does adding sleep to
lightdm.service produce ?? I think I am missing the point :)

Regards


Frank
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