Re: [Xen-users] No video display, SuSE kernel-xen-2.6.11.4-21.7

[David F Barrera <dfbp@xxxxxxxxxx>]

>My grub config:
> 
> title XEN
>      kernel (hd0,0)/xen.gz dom0_mem=204800
>      module (hd0,0)/vmlinuz-xen root=/dev/system/dom0_root_hdc 
> selinux=0  splash
Try adding console=tty0 to the line above

> =silent showopts
>      module (hd0,0)/initrd-xen
> 

On Mon, 2005-06-13 at 19:34 +0100, Robbie Dinn wrote:
> Hi all
> 
> This is a strange one. On upgraging to SuSE kernel-2.6.11.4-21.7, I have
> suddenly found that I loose the video on boot up! The video disappears
> very early in boot, possibly while Xen hypervisor is starting, printing
> out the physical memory map.
> 
> If you are patient and wait for the machine to reach run level 5,
> the X server starts up and you get a picture back. You can then
> switch back and forth between virtual terminal 7 (X server) and
> virtual terminals 1 to 6 (which remain black).
> 
> I put an osciloscope on the VGA sync to see what they were doing.
> They look fine, HSync 31.5KHz, 3.6uS high 27.9uS low,
> VSync 62.5Hz, 2 lines low, ~448 line high
> (This is with virtual terminal 1 selected ).
> 
> I have seen this on two different machines.
> 
> First is a Mitac laptop, Athlon64 process (running 32 bit mode),
> Via chip set, ATI Radeon 9600 M10 video
> 
> Second is a Pentium III board, BX chip set, Chips & Technologies
> 69000 video.
> 
> Software in use...
> 
> Xen:
>  From 'xm dmesg'
> Xen version 2.0.6a-0.1 (abuild@xxxxxxx) (gcc version 3.3.5 20050117 
> (prerelease
> ) (SUSE Linux)) Fri Jun 10 19:30:50 UTC 2005
> 
> This is the xen-2.0.6a-0.1.i586.rpm from Kurt Garloff's page.
> 
> I have also tried a xen-2.0-testing that I compiled myself
> (with the rev 1.1899 "Ensure we only handle writable pagetable faults 
> taken in guest kernel")
> Same outcome
> 
> kernel on domO:
> 
> paradox:~ # rpm -q kernel-xen
> kernel-xen-2.6.11.4-21.7
> paradox:~ #
> 
> This is a kernel down loaded from Kurt Garloff's Page
> 
> I also tried a kernel that I compiled myself with the
> SuSE kernel sources that were release last week. I got the
> same misbehaviour. I thought that this was due to my error
> in configuring the kernel. I tried recompiling with
> CONFIG_FB turned off, but that did not help.
> 
> My grub config:
> 
> title XEN
>      kernel (hd0,0)/xen.gz dom0_mem=204800
>      module (hd0,0)/vmlinuz-xen root=/dev/system/dom0_root_hdc 
> selinux=0  splash
> =silent showopts
>      module (hd0,0)/initrd-xen
> 
> (hd0,0 is my /boot partition
> these symbolic links are in place
> 
> paradox:~ # ls -l /boot/xen.gz
> lrwxrwxrwx  1 root root 17 Jun 13 13:11 /boot/xen.gz -> xen-2.0.6a-0.1.gz
> paradox:~ # ls -l /boot/vmlinuz-xen
> lrwxrwxrwx  1 root root 25 Jun 13 13:11 /boot/vmlinuz-xen -> 
> vmlinuz-2.6.11.4-21.7-xen
> paradox:~ # ls -l /boot/initrd-xen
> lrwxrwxrwx  1 root root 24 Jun 13 13:11 /boot/initrd-xen -> 
> initrd-2.6.11.4-21.7-xen
> 
> My initrd has these modules in it:
> 
> paradox:~ # zcat /boot/initrd-2.6.11.4-21.7-xen | cpio -i -t | grep -E 
> '^lib/modules'
> 7161 blocks
> lib/modules
> lib/modules/2.6.11.4-21.7-xen
> lib/modules/2.6.11.4-21.7-xen/kernel
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide/ide-core.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide/pci
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide/pci/piix.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide/ide-disk.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/ide/ide-cd.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/md
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/md/raid1.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/md/dm-mod.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/md/dm-snapshot.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/cdrom
> lib/modules/2.6.11.4-21.7-xen/kernel/drivers/cdrom/cdrom.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/fs
> lib/modules/2.6.11.4-21.7-xen/kernel/fs/jbd
> lib/modules/2.6.11.4-21.7-xen/kernel/fs/jbd/jbd.ko
> lib/modules/2.6.11.4-21.7-xen/kernel/fs/ext3
> lib/modules/2.6.11.4-21.7-xen/kernel/fs/ext3/ext3.ko
> paradox:~ #
> 
> None of this is causing me any great problem because
> the machine is sitting in a server rack in another
> room. I can ssh to it or use the serial console.
> 
> It will confuse the hell out of a new user though!
> 
> Does anyone have any suggests as to what to try to debug/fix this?
> 
> Robbie Dinn
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
> 
-- 
Regards,

David F Barrera
Linux Technology Center
Systems and Technology Group, IBM

"The wisest men follow their own direction. "
                                                        Euripides


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