Newbie question, but I can''t find the answer anywhere: I need to look at the (XEN).... messages that scroll by like lightning. Way too fast for a human to read them. I can''t pause them (No respond to ctrl-S or Scrl-Lock). I can''t redirect them to serial (My computer has no serial port). I can''t send them to disk. (No way I know of. Seems unlikely, anyway, since there are no mounted filesystems yet). I can''t find any grub xen command line option that will slow them down to human-readable speed. I even tried to catch them with my digital camera, but that failed. (Shutter lag is too great, tried about 100 times, but can''t capture the screen at the right instant. Any thoughts on how to slow the (XEN)... messages to human-readable speed? Thanks, Derek. -- View this message in context: http://www.nabble.com/How-to-see-%28XEN%29-messages--tf2143024.html#a5915763 Sent from the Xen - User forum at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Derek wrote:> Newbie question, but I can''t find the answer anywhere: > > I need to look at the (XEN).... messages that scroll by like lightning. > Way too fast for a human to read them.If you''re able to get a dom0 running you can use "xm dmesg" (as root). Cheers Andrew _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> If you''re able to get a dom0 running you can use "xm dmesg" (as root).That did the trick. Thanks. Still, I think a "slow down" command-line parameter passed to xen from the boot loader would be a great option to have. Had I not been able to boot dom0, I''d have been stuck, since my PC doesn''t have a serial port. -- View this message in context: http://www.nabble.com/How-to-see-%28XEN%29-messages--tf2143024.html#a5927906 Sent from the Xen - User forum at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Derek > Sent: 22 August 2006 16:31 > To: xen-users@lists.xensource.com > Subject: Re: [Xen-users] How to see (XEN) messages? > > > > > If you''re able to get a dom0 running you can use "xm dmesg" > (as root). > > That did the trick. Thanks. > > Still, I think a "slow down" command-line parameter passed to > xen from the > boot loader would be a great option to have. Had I not been > able to boot > dom0, I''d have been stuck, since my PC doesn''t have a serial port.In that particular scenario, you can use the "noreboot" option, and you could also slow down the output by setting up a serial output to "com1=300,n81 console=com1,vga sync_console" (even if you don''t have a serial port on your machine, it will still output to serial port, because your chipset _WILL_ have a serial port on it - at least I''m not aware of any serial-port-free chipsets - you just can''t connect to it). Since the output goes to both serial and console, it comes out pretty slowly on the serial port. That at least works for the Xen part of things. And if you set Linux console to "console=/dev/ttyS0,/dev/console" (or the corresponding) retaining the serial port at 300 bps, it should come out slowly from Linux too... -- Mats> -- > View this message in context: > http://www.nabble.com/How-to-see-%28XEN%29-messages--tf2143024 > .html#a5927906 > Sent from the Xen - User forum at Nabble.com. > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> In that particular scenario, you can use the "noreboot" option,Doesn''t help because the (XEN)... output is more lines than the screen holds. Most of the lines are scrolled off already . I was looking for the CPU initialization messages which occur fairly early on.> you could also slow down the output by setting up a serial output to > "com1=300,n81 console=com1,vga sync_console"That was the first thing I tried. But the output still scrolled by just as fast.> (even if you don''t have a serial port on your machine, it will still > output to serial port, because your chipset _WILL_ have a serial port on > it - at least I''m not aware of any serial-port-free chipsets - you just > can''t connect to it).My chipset is the Intel 82801H. Not sure whether or not it has a hidden serial port, but at any rate "com1=300,n81 console=com1,vga sync_console" didn''t help slow it down. Any way, thanks to the the "xm dmesg" command, I''m out of the woods. Cheers, Derek. -- View this message in context: http://www.nabble.com/How-to-see-%28XEN%29-messages--tf2143024.html#a5933909 Sent from the Xen - User forum at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
I think I''m spoiled with the KVM -> IP I have which has this handy scroll bar ... but prior to getting that , I used a very old very generic video card with tv-out , or a vga -> tv driver-less adapter like you''d use for a presentation. Then I just chucked a tape in the VCR and went back to view it. Had this exact same problem the last time I tried installing OpenSSI without Xen in the mix at all. dmesg has all the goods, but you must first boot to get to dmesg :) HTH -Tim On Tue, 2006-08-22 at 08:30 -0700, Derek wrote:> > > If you''re able to get a dom0 running you can use "xm dmesg" (as root). > > That did the trick. Thanks. > > Still, I think a "slow down" command-line parameter passed to xen from the > boot loader would be a great option to have. Had I not been able to boot > dom0, I''d have been stuck, since my PC doesn''t have a serial port._______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users