Gentoo Archives: gentoo-user

From: Glenn Enright <elinar@×××××××.nz>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] system won't stop....
Date: Wed, 06 Jul 2005 10:46:27
1 On Tue, 05 Jul 2005 21:05, Digby Tarvin wrote:
2 > On Mon, Jul 04, 2005 at 04:57:28PM +1200, Glenn Enright wrote:
3 > Thus after verifying that everything is ok after initial boot to
4 > runlevel 3, I can run telinit 5 to start the X server.
5 >
6 > The system I ssh'd from was a BSD/OS system at runlevel 5.
7 OK looks like you know all about sysinit and its toys :)
9 <snip>
10 > Agian, console wasn't working so I had done this from a root shell
11 > in the SSH sesion. ('/sbin/shutdown -r now' is just a wrapper for
12 > halt, so if halt doesn't work, no shutdown incantations are going
13 > to do much...)
14 Actually the situation seems to be a bit different from that.
16 from 'man halt'
17 ** if halt or reboot is called when the system is not in runlevel 0 or 6, in
18 other words when it's running normally, shutdown will be invoked instead
19 (with the -h or -r flag). For more info see the shutdown(8) manpage.
21 from 'man shutdown'
22 ** shutdown brings the system down in a secure way. All logged-in users are
23 notified that the system is going down, and login(1) is blocked. It is
24 possible to shut the system down immediately or after a specified delay. All
25 processes are first notified that the system is going down by the signal
26 SIGTERM. This gives programs like vi(1) the time to save the file being
27 edited, mail and news processing programs a chance to exit cleanly, etc.
28 shutdown does its job by signalling the init process, asking it to change the
29 runlevel.
31 so calling shutdown to start with should be more reliable, given that the
32 system is still 'running'. Hence the reason its used in the init scripts.
34 > > did you try
35 > > "/etc/init.d/xdm stop"
36 > > This should stop the X session if you started it using the standard
37 > > bootup proccess.
38 >
39 > That is what init does when switching to runlevel 3.
41 Only if youve been messing with your init scripts
43 One big difference with the sysinit levels and gentoo init-levels is
44 conceptual. Sysinit allows to to cumulatively start programs as you increase
45 the level. In gentoo changing levels seems to cause all stuff in the original
46 to stop and then all in the new level to start, with only the 'boot' level
47 stuff running always.
49 So if you have a net service and samba running in 'default' and change to your
50 'graphics' level (or whatever you called it) then unless those services are
51 assigned to that level also they will be stopped until you change back or
52 start them manually. This may be the cause of your instability?
55 > I am pretty sure that this is a result of a bug in the X server (another
56 > reason not to start it in the default runlevel) which means that the
57 > kernel can't shut it down - a problem that any process stuck in a driver
58 > call, but there should be some way to halt the rest of the system so at
59 > least the filesytems are unmounted cleanly etc.
60 >
62 Thats what the shutdown command is supposed to do.
64 Anyway this is getting away from the real problem you seem to have with your X
65 server. I agree that there does seem to be a problem there of some sort.
67 from 'man 7 signal' which is referenced by 'man kill' you could try
68 kill SIGSTOP process_number
70 and make sure you check your logs when you do get a crash. should be a
71 ~/.xsession_errors and a /var/log/Xorg.0.log(.old) or similar at the very
72 least.
73 --
75 Time-sharing is the junk-mail part of the computer business.
76 -- H.R.J. Grosch (attributed)