(next-buffer) : emacs hangs

(next-buffer) : emacs hangs

[Markus Grunwald]

Hello,

I'm using GNU Emacs 22.2.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
Every now and then, when I have multiple buffers open and press C-x
left/right or otherwise use (next-buffer) or (previous-buffer) emacs hangs
completely. CPU is at 100%. The only thing that is still working then is a
repaint when I hide/unhide the window.

How can i find out what's happening ? It is really annoying and
unfortunately hard to reproduce :(

TIA
Markus

Re: (next-buffer) : emacs hangs

[Nikolaj Schumacher]

Markus Grunwald <markus.grunwald@gmx.de> wrote:

> emacs hangs completely. CPU is at 100%. The only thing that is still
> working then is a repaint when I hide/unhide the window.
>
> How can i find out what's happening ? It is really annoying and
> unfortunately hard to reproduce :(

Does C-g get you out?  If so, you can set debug-on-quit to get a
backtrace, otherwise you'll need to use GDB.

regards,
Nikolaj Schumacher

Re: (next-buffer) : emacs hangs

[Markus Grunwald]

On Tue, 24 Jun 2008 20:14:03 +0200, Nikolaj Schumacher wrote:

>> emacs hangs completely. CPU is at 100%. [...]
>>
>> How can i find out what's happening ? I
> 
> Does C-g get you out?  If so, you can set debug-on-quit to get a
> backtrace, otherwise you'll need to use GDB.

Unfortunately, C-g doesn't help. So I'll attach gdb next time...

Thanks,
Markus

Re: (next-buffer) : emacs hangs

[The Grue]

On 24 Jun., 20:14, Nikolaj Schumacher <n_schumac...@web.de> wrote:
> > emacs hangs completely. CPU is at 100%. The only thing that is still
> > working then is a repaint when I hide/unhide the window.

> Does C-g get you out?  If so, you can set debug-on-quit to get a
> backtrace, otherwise you'll need to use GDB.

Well, C-g doesn't help so I tried to run emacs in gdb - but I'm stuck :
(

I deleted the sources from which I built my emacs. So I just fetched
the tar file again.
Then I started gdb:
me@somewhere >gdb /opt/emacs/bin/emacs
GNU gdb 6.6 [...]
(gdb) dir /home/me/src/emacs-22.2/src
Source directories searched: /home/me/src/emacs-22.2/src:$cdir:$cwd
run
(gdb) run
Starting program: /opt/emacs/bin/emacs
[Thread debugging using libthread_db enabled]
[New Thread -1219377472 (LWP 4623)]

-----> I press C-c

Program received signal SIGINT, Interrupt.
[Switching to Thread -1219377472 (LWP 4623)]
0xb7ef7410 in ?? ()
(gdb) bt
#0  0xb7ef7410 in ?? ()
#1  0xbfe6e8a8 in ?? ()
#2  0x00000000 in ?? ()

So there's no debug info ? I 've surely done something wrong but I
don't know what. The emacs binary has debug info, so this should work,
shouldn't it ?

Thanks for any help,
Markus