On Wed, Nov 02, 2011 at 08:14:17PM +0200, Rudi Ahlers wrote: > Hi all, > > I have an odd problem, for which I couldn't find any suggestions on google. > > A CentOS 5.7x64 gives me a blank screen on bootup, both to the 17" LCD > monitor connected to the VGA port, and to the KVMOVIP device > built-into the server, This sometimes seems to happen when it goes into framebuffer. Sometimes, it's an NVidia card trying to use nouveau, sometimes, the fb module is missing, but it's never something I've investigated that thoroughly. I see from your menu that you're running a xen kernel. I'm afraid I'm not at all familiar with them. However, you might try (no guarantee) using nomodeset in the places where you have nofb. I'll make the disclaimer that my solution may have nothing to do with your problem, but I do know that what you're describing has happened to me on older Fedora versions, and the problem was that when it went from normal to framebuffer mode, something broke. Leaving your grub for reference. > > First few lines of /etc/grub.conf: > > # initrd /initrd-version.img > #boot=/dev/md0 > default 0 > > timeout=5 > splashimage=(hd0,0)/grub/splash.xpm.gz > hiddenmenu > title CentOS (2.6.18-274.7.1.el5xen) > root (hd0,0) > kernel /xen.gz-2.6.18-274.7.1.el5 dom0_mem=786M > module /vmlinuz-2.6.18-274.7.1.el5xen ro root=/dev/LVM01/root nofb > module /initrd-2.6.18-274.7.1.el5xen.img > title CentOS (2.6.18-274.7.1.el5) > root (hd0,0) > kernel /vmlinuz-2.6.18-274.7.1.el5 ro root=/dev/LVM01/root nofb > initrd /initrd-2.6.18-274.7.1.el5.img > -- Scott Robbins PGP keyID EB3467D6 ( 1B48 077D 66F6 9DB0 FDC2 A409 FA54 EB34 67D6 ) gpg --keyserver pgp.mit.edu --recv-keys EB3467D6 Angelus: 'Dear Buffy...' Hmmm. I'm still trying to decide the best way to send my regards. Spike: Why don't you rip her lungs out? That might make an impression. Angelus: Lacks... poetry. Spike: Doesn't have to. What rhymes with lungs?