any web site. 在 2010-5-11 上午11:16，"Jeffrey Lynn Parke Jr." <jeffrey.parke@gmail.com>编写： which website does this for you. any website or one in particular. On Mon, May 10, 2010 at 10:14 PM, Handsome Cheung <handsomecheung@gmail.com>wrote:

hi all,

I am a newbie for ArchLinux.

My computer often shuts down suddenly when I browse ...

sounds increadible. ... is your system running some strange scripts ? On Tue, May 11, 2010 at 1:50 PM, Gaurish Sharma <contact@gaurishsharma.com>wrote:

On 05/11/2010 08:44 AM, Handsome Cheung wrote:

...

hi all,

I am a newbie for ArchLinux.

My computer often shuts down suddenly when I browse web site. It brings me to TTY and said "The system is going down for system halt NOW!". I found that is because of the crash of flash plugin of firefox.

And my question is why the crash of firefox can cause my computer shuts down?

PS. my system environment: Arch + awesome, no DE. Thanks!

hc

Are you using some sort of AutoShutdown schedule? check 'sudo crontab -l'

-- Regards, Gaurish Sharma www.gaurishsharma.com

-- Arch Linuxer, Pythoner, Geek --> Blog: http://apt-blog.net

On 05/11/2010 06:08 PM, Handsome Cheung wrote:

I've checked it, and there is no suspicious item. And the truth is everytime the computer's shutdown come with crash of firefox.

Hi, Can you another Browser(Like google-chrome) for a while and see if the problem repeats. It will help to isolate the issue -- Regards, Gaurish Sharma www.gaurishsharma.com

yes, I run hal, but don't use display manager. Your answer inspired me, and I will check something about hal immediately. Thanks! On Tue, May 11, 2010 at 02:20:17PM +0200, Thomas B�chler wrote:

Am 11.05.2010 05:14, schrieb Handsome Cheung:

...

hi all,

I am a newbie for ArchLinux.

My computer often shuts down suddenly when I browse web site. It brings me to TTY and said "The system is going down for system halt NOW!". I found that is because of the crash of flash plugin of firefox.

And my question is why the crash of firefox can cause my computer shuts down?

PS. my system environment: Arch + awesome, no DE. Thanks!

Frankly, I can't make any connection between firefox and shutting down. Shutting down the computer would mean a severe privilege violation. Are you running hal, or using any display manager? They are the only ones that may allow you to shut down unless you are root.

On 11/05/10 13:59, Thomas Bächler wrote:

Am 11.05.2010 14:56, schrieb Handsome Cheung:

...

yes, I run hal, but don't use display manager. Your answer inspired me, and I will check something about hal immediately. Thanks!

Even if the user is allowed to use hal to initiate a shutdown, it would still be necessary to exploit a security weakness in firefox that would allow an attacker to execute arbitrary commands. And a matching exploit would have to be on any website that triggers the shutdown ... this all sounds very unlikely.

I'm willing to bet that this is no exploit ad in-fact a bug at some point in the stack. A couple years ago I found I could almost crash xorg at will with my questionable C code(I was just learning C) and a couple time the xorg crash resulted in a reboot/shutdown. Does it persist with another xorg driver?

Am 11.05.2010 18:09, schrieb b1:

Well it seesm like you are not the only one with this problem. I think I experience the same, although with a slightly different setup and therefore alternate consequences. I am running gnome on my 32bit Arch Linux machine, with a ati graphics-card. Sometimes firefox crashes and gnome restarts. No complete shutdown in my case, but I have to login again. However this only happens with the flash-plugin being enabled. Unfortunately I wasn't able to reproduce the problem, it occurs without any pattern (At least none which I could discover).

However, i therefore installed flashblock on firefox. Since then I havn't experienced this problem again. Therefore I think that your shutdown (my gnome restart) is definitly caused by flashplugin+firefox itself. Overheating or strange scripts, aren't the problem in my case (I am sure, since it is a pretty standard install and the temps are ok).

Currently I was waiting for the next update to eventually fix the problem (since I can live without flash). But eventually someone has some clues of how to troubleshoot this (Is there any firefox stacktrace???).

There is a huge difference between your problem and the other one: Yours is perfectly explained by a bug in the X server or your display driver (when this happened, look at /var/log/Xorg.0.log.old for a backtrace), which would be triggered by the flashplugin. The original problem involves a graceful system shutdown, which is not explained by any bug I can think of.