Hello, I''ve installed the new XEN-Server 6.2 on a Test-Notebook (64Bit/8Gbyte RAM) After a short while without interacting, the complete system freezes, no console, no icmp, ... After reboot, nothing in /var/log/messages and "xe host-crashdump-list" does not show a crashdump .. I don''t have Installed a VM Guest yet, plain installation, access from XenCenter is available. Before this, I had running proxmox 1.9 and 2.0 on this notebook without problems, so I don''t believe in hardware problems. Can anyone guide me to debug/solve this problem? (I''m a complete newbie with XEN-Server.) Thanks Meike
Hello, Meike, A notebook is not a very friendly hardware to debug on. What you may try to do is to get XenServer''s "last breath", via a serial port (surely your notebook does not have one, but...) or via network console. Check this reference about netconsole: http://www.cyberciti.biz/tips/linux-netconsole-log-management-tutorial.html Greetings. El 05/07/13 09:59, Meike Stone escribió:> Hello, > > I''ve installed the new XEN-Server 6.2 on a Test-Notebook (64Bit/8Gbyte RAM) > After a short while without interacting, the complete system freezes, > no console, no icmp, ... > > After reboot, nothing in /var/log/messages and "xe > host-crashdump-list" does not show a crashdump .. > > I don''t have Installed a VM Guest yet, plain installation, access from > XenCenter is available. > > Before this, I had running proxmox 1.9 and 2.0 on this notebook > without problems, so I don''t believe in hardware problems. > > Can anyone guide me to debug/solve this problem? > (I''m a complete newbie with XEN-Server.) > > Thanks Meike > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xen.org > http://lists.xen.org/xen-users >-- Alexandre Kouznetsov
Hola Alexandre,> Hello, Meike, > > A notebook is not a very friendly hardware to debug on. What you may try to > do is to get XenServer''s "last breath", via a serial portYes, that''s bad ... but for testing, it''s a small "server", to take away and enough to shoulder up to 3..4 guests.> (surely your notebook does not have one, but...)How do you know this ... ;-)> or via network console. > > Check this reference about netconsole: > http://www.cyberciti.biz/tips/linux-netconsole-log-management-tutorial.htmlBTW, it has something slightly changed (using of netcat, and how to call the module) Thanks for the hint, but the result looks like the other ways, no output ... I tested the netconsole via magic sysreq (like noted from a guest below the article) It is absolutly curious, the system freeze, the console screen is turned to black, no console via fn-Fx changeable, network stack is death (no icmp) ... Is there a posibility the change to a other kernel, or any XEN specific parameters in the machine to configure or for the bootpromt? Thanks Meike
Check to see if your bios has c-states enabled. http://support.citrix.com/article/CTX127395 -----Original Message----- From: xen-users-bounces@lists.xen.org [mailto:xen-users-bounces@lists.xen.org] On Behalf Of Meike Stone Sent: Saturday, July 06, 2013 4:57 PM To: Alexandre Kouznetsov Cc: xen-users Subject: Re: [Xen-users] XEX-Server 6.2 freezes Hola Alexandre,> Hello, Meike, > > A notebook is not a very friendly hardware to debug on. What you may > try to do is to get XenServer''s "last breath", via a serial portYes, that''s bad ... but for testing, it''s a small "server", to take away and enough to shoulder up to 3..4 guests.> (surely your notebook does not have one, but...)How do you know this ... ;-)> or via network console. > > Check this reference about netconsole: > http://www.cyberciti.biz/tips/linux-netconsole-log-management-tutorial > .htmlBTW, it has something slightly changed (using of netcat, and how to call the module) Thanks for the hint, but the result looks like the other ways, no output ... I tested the netconsole via magic sysreq (like noted from a guest below the article) It is absolutly curious, the system freeze, the console screen is turned to black, no console via fn-Fx changeable, network stack is death (no icmp) ... Is there a posibility the change to a other kernel, or any XEN specific parameters in the machine to configure or for the bootpromt? Thanks Meike _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users
Hello. El 06/07/13 16:56, Meike Stone escribió:>> Check this reference about netconsole: >> http://www.cyberciti.biz/tips/linux-netconsole-log-management-tutorial.html > BTW, it has something slightly changed (using of netcat, and how to > call the module) > > Thanks for the hint, but the result looks like the other ways, no output ... > I tested the netconsole via magic sysreq (like noted from a guest > below the article)This, along with serial console, are the most low level ways I know about getting information form a freezing system.> It is absolutly curious, the system freeze, the console screen is > turned to black, no console via fn-Fx changeable, network stack is > death (no icmp) ...BTW, does the console turns blank because the host freeze, or it turns blank before that due to "energy saving"? Try disabling that stuff. Make sure it boots into a plain VGA console (vga=normal in kernel boot line) instead of framebuffer, no "quiet" boot or splash screen. Make sure the console blanking is disabled. http://mark.koli.ch/2008/11/howto-disable-linux-screen-blanking-disable-powersave.html http://unix.stackexchange.com/questions/8056/disable-screen-blanking-on-text-console http://www.cyberciti.biz/tips/linux-disable-screen-blanking-screen-going-blank.html> Is there a posibility the change to a other kernel, or any XEN > specific parameters in the machine to configure or for the bootpromt?There are some additional things you may try. 1. Check if the kernel alone triggers the condition, or something within the OS normal boot. Load kernel but prevent the OS form finishing booting and leave it for a while to see if it freezes or not. The most simple way I can think of is to force single-user mode by adding "init=/bin/bash" to kernel command line. 2. Try another Xen''s version or Linux Kernel, just to see if the behavior change. Not sure what would be a cleaner procedure under XenServer (CentOS), but should be pretty plain. 3. Check your hardware: CPU burn test, memtest, etc. Greetings. -- Alexandre Kouznetsov
Hello> > BTW, does the console turns blank because the host freeze, or it turns blank > before that due to "energy saving"? Try disabling that stuff.This was the solution ... Thanks!!! XEN now is running very well :-) But why does the system freeze only if the "blank screensaver" on the console starts?? But anyway .. now it works Kindly regards Meike
Hello. El 10/07/13 11:31, Meike Stone escribió:> Hello > >> >> BTW, does the console turns blank because the host freeze, or it turns blank >> before that due to "energy saving"? Try disabling that stuff. > > This was the solution ... Thanks!!! > XEN now is running very well :-) > > But why does the system freeze only if the "blank screensaver" on the > console starts?? > But anyway .. now it worksNice. I don''t think the console blanking is the direct cause of the freeze. I don''t know how exactly did you disabled it (there are several methods), but maybe whatever you did removed the freeze cause as side effect. Maybe the instability had do to with use of framebuffer (you did disabled it, didn''t you?). Buggy video card? Greetings. -- Alexandre Kouznetsov