54 messages in org.freebsd.freebsd-smpRe: SMP + XDM = keyboard lockup | From | Sent On | Attachments |
|---|---|---|
| Richard Scheper | Jul 22, 1999 5:31 am | |
| Kazutaka YOKOTA | Jul 22, 1999 5:45 am | |
| Richard Scheper | Jul 22, 1999 6:04 am | |
| Richard Scheper | Jul 22, 1999 7:17 am | |
| Thomas Dean | Jul 22, 1999 9:34 am | |
| Richard Scheper | Jul 22, 1999 10:09 am | |
| Nate Williams | Jul 22, 1999 10:24 am | |
| Terry Lambert | Jul 22, 1999 11:00 am | |
| Richard Scheper | Jul 22, 1999 11:05 am | |
| Nate Williams | Jul 22, 1999 11:11 am | |
| Nate Williams | Jul 22, 1999 11:16 am | |
| Richard Scheper | Jul 22, 1999 11:16 am | |
| Terry Lambert | Jul 22, 1999 11:16 am | |
| Terry Lambert | Jul 22, 1999 11:38 am | |
| Mike Smith | Jul 22, 1999 11:42 am | |
| Nate Williams | Jul 22, 1999 11:45 am | |
| Terry Lambert | Jul 22, 1999 11:45 am | |
| Terry Lambert | Jul 22, 1999 11:50 am | |
| Terry Lambert | Jul 22, 1999 11:52 am | |
| Mike Smith | Jul 22, 1999 11:53 am | |
| Nate Williams | Jul 22, 1999 11:55 am | |
| Richard Scheper | Jul 22, 1999 12:15 pm | |
| Garance A Drosihn | Jul 22, 1999 1:57 pm | |
| Garance A Drosihn | Jul 22, 1999 2:00 pm | |
| Richard A. Scheper | Jul 22, 1999 6:33 pm | |
| Terry Lambert | Jul 22, 1999 6:34 pm | |
| Terry Lambert | Jul 22, 1999 6:36 pm | |
| Matthew Dillon | Jul 22, 1999 6:45 pm | |
| Thomas Dean | Jul 22, 1999 6:47 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 8:10 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 8:45 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 9:01 pm | |
| Chris D. Faulhaber | Jul 22, 1999 9:17 pm | |
| Matthew Dillon | Jul 22, 1999 9:31 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 9:45 pm | |
| Thomas Dean | Jul 22, 1999 9:51 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 10:06 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 10:19 pm | |
| Kazutaka YOKOTA | Jul 22, 1999 10:29 pm | |
| Thomas Dean | Jul 22, 1999 11:03 pm | |
| Marc van Kempen | Jul 23, 1999 12:42 am | |
| Nate Williams | Jul 23, 1999 9:19 am | |
| Nate Williams | Jul 23, 1999 9:23 am | |
| Nate Williams | Jul 23, 1999 9:27 am | |
| Terry Lambert | Jul 23, 1999 4:21 pm | |
| Matthew Dillon | Jul 23, 1999 4:43 pm | |
| Bruce Evans | Jul 23, 1999 4:59 pm | |
| Terry Lambert | Jul 23, 1999 5:14 pm | |
| Bruce Evans | Jul 23, 1999 5:41 pm | |
| Kazutaka YOKOTA | Jul 24, 1999 1:17 am | |
| Kazutaka YOKOTA | Jul 24, 1999 1:21 am | |
| Terry Lambert | Jul 26, 1999 1:39 pm | |
| Kazutaka YOKOTA | Aug 6, 1999 11:29 pm | |
| Nate Williams | Aug 8, 1999 11:08 am |
| Subject: | Re: SMP + XDM = keyboard lockup | |
|---|---|---|
| From: | Kazutaka YOKOTA (yok...@zodiac.mech.utsunomiya-u.ac.jp) | |
| Date: | Jul 22, 1999 8:45:06 pm | |
| List: | org.freebsd.freebsd-smp | |
It is true that switching between X and text vtys fast by hitting CTL-ALT-Fx repeatedly may cause keyboard lockup.
You can lock up the keyboard if you try to switch between them at the *wrong* moment. For example, many people have reported the keyboard lockup when they tried to switch vtys while the X server is starting up.
VT switching is a tricky business and the XFree86 servers and syscons, from time to time, do not see each other in eye to eye...
This is not I/O contention. It is an algorithm problem.
# This, I believe, is mostly fixed in 4.0-CURRENT.
But, I do not believe this is the cause of your problem. Because it is the xdm/X server alone that is switching vtys when your keyboard lockup happens. You, the user, are not switching vtys when this is happening. Nor over-loaded I/O is the cause; the X server alone is exercising inb()/outb() when your lockup happens. There is no I/O contention.
Kazu
It looks like your suspiscions are correct. After further attempts at starting xdm from a root seesion, it does in fact hang more often than not. Perhaps I was just "lucky" and it only worked with a quiet system.
I'll try the ps test and see what I get
-Rich
Terry Lambert wrote:
Wow! That's a lot to chew and mostly over my head, but a couple of questions..
If what you say is true, then wouldn't I have toruble running xdm even from a root login after the boot process is over? I don't.
No, not if the system is relatively quiescent.
As I told Nate, you should be able to easily test this by loading the I/O system (preferrably *not* your disks) and bouncing the console in and out of X using ctrl-alt-F1/[ctrl-]alt-F4. If it locks up, the problem has been identified.
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