On 02/23/2015 10:53 PM, Digimer wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 23/02/15 11:11 PM, Robert Nichols wrote: >> Would someone please point me to some reasonably current >> instructions for getting greater than 1024x768 video resolution for >> a CentOS 6 guest on a CentOS 6 KVM/qemu host? When I search online >> I find stuff from 2009 and 2010 saying, "For details see ...," and >> linking to a URL that no longer exists, or pages that say, "You >> need to switch from VNC to Spice," and giving a long list of >> out-of-date instructions for doing so. (With virt-manager it takes >> 2 clicks to do that. Of course it doesn't help -- still maxes out >> at 1024x768.) >> >> I've found that I can just append "vga=0x380" to the kernel >> command line and see Plymouth come up with the full graphical boot >> screen in the correct 1440x900 resolution, but as soon as gdm >> starts up, the display scrambles. I find suggestions to generate >> an xorg.conf file, but no mention of what to put in it. I can run >> "Xorg -configure", but the resulting file contains nothing about >> video modes, so it's not apparent what needs to be added. >> >> I find it particularly annoying that a Windows 7 guest can set any >> resolution I want up to 2560x1600, but a Linux guest can't go >> higher than 1024x768. > > I played with this and found that, in fact, I had to switch the spice > / qxl. With that change, I had no trouble pushing EL6 to much higher > resolutions. Thank you for the reassurance that it _should_ work. I finally got it going. The VM still always starts out in 1024x768 and I have to set the higher resolution every time I log in. For a while, that was working only the first time I set it, and on subsequent logins any attempt to change the resolution either locked up or caused the Xorg server to crash. All the RPMs verified OK and a forced fsck of the filesystems found nothing. I eventually just reinstalled the whole VM, and it's working now. The whole thing was bringing back bad memories of an ancient version of Slackware and kernel version 0.99pl53. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.