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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] Re: graphically accessing pv guest
That's an X Windows error (Can't open display). What is your DISPLAY set to? Are you running an X Server? Mel On Tue, Mar 1, 2011 at 6:51 PM, Ted Brenner <griztown@xxxxxxxxx> wrote: > So I made these changes but now I get the following error after typing in > #xm vncviewer domainID > > invoking vncviewer 0.0.0.0:1 > No protocol specified > Error: Can't open display: :0.0 > > I'm currently listening on 0.0.0.0 but I've also tried 127.0.0.1 with the > same affect. What would cause this error? > > On Sun, Feb 27, 2011 at 10:27 PM, Fajar A. Nugraha <list@xxxxxxxxx> wrote: >> >> On Mon, Feb 28, 2011 at 10:15 AM, Ted Brenner <griztown@xxxxxxxxx> wrote: >> > Is it possible that in Xen 4.0+, the 'xenfb.video' should be added to >> > the >> > kernel line of the /boot/grub/menu.lst file? >> > >> > On Sun, Feb 27, 2011 at 10:49 AM, Ted Brenner <griztown@xxxxxxxxx> >> > wrote: >> >> >> >> Hi all, >> >> >> >> I'm trying to expand the screen resolution of my guest when using vnc. >> >> It >> >> appears I need to use the extra variable in my guest config file and >> >> xenfb. >> >> I pass it in like this: >> >> >> >> extra = 'xenfb.video=8,1024,768' >> >> >> >> I can see this being passed to the kernel when it boots but it doesn't >> >> change the vnc screen resolution. >> >> Thanks for pointing out that parameter. >> >> There are three parts answer to your question. >> >> The first part, being how to pass a parameter to kernel. That would >> depend on how you boot domU: >> - If you use pygrub/pv-grub, then the correct way to pass it would be >> to edit domU's grub config file (or some other config file that is >> used to generate it, like /etc/default/grub). >> - If you use pygrub, you might be able to use "args" to add it without >> editing domU's grub config file >> - If you use "kernel" and "ramdisk", then the right way to add it is >> on "extra" line (which should already contain things like "root=") >> You can check with "cat /proc/cmdline" inside domU to see if the >> parameter is correctly passed to domU kernel. >> >> The second part is where to put the parameter: >> - If xen vfb support is compiled built-in in domU kernel, then the >> only place to pass it is on domU kernel command line, using one oh the >> three options mentioned above >> - If xen vfb support is built as a module, you can pass it on domU >> kernel command line, or by simply creating a .conf file on >> /etc/modprobe.d (recommended) >> >> The third part is what's the correct module name, and what parameter >> to pass. In Ubuntu maverick, the module name is xen-fbfront. >> $ modinfo xen-fbfront >> filename: >> /lib/modules/2.6.35-25-generic/kernel/drivers/video/xen-fbfront.ko >> alias: xen:vfb >> license: GPL >> description: Xen virtual framebuffer device frontend >> srcversion: 0EB34742ACF8D2559403034 >> depends: fb_sys_fops,syscopyarea,sysfillrect,sysimgblt >> vermagic: 2.6.35-25-generic SMP mod_unload modversions >> parm: video:Video memory size in MB, width, height in pixels >> (default 2,800,600) (array of int) >> >> >> So considering all three parts, if you use Ubuntu maverick and want to >> use 1280x1024, you can just create a file like this: >> $ cat /etc/modprobe.d/xen-fbfront.conf >> options xen-fbfront video=32,1280,1024 >> >> A "depmod -a" and "update-initramfs -u" might be needed afterwards. >> After reboot, it should correctly use 1280x1024 resolution. >> >> I still say you should use things like NX/xrdp/vnc server inside domU >> though (my favorite is xrdp). It's smooth, easy to install (apt-get >> install xrdp), can allow you to choose different resolution without >> having to reboot (just specify the desired resolution and color depth >> when you connect), and allows you to have multiple GUI session to the >> client (using idfferent user-resolution-depth combination) >> >> -- >> Fajar > > > > -- > Ted Brenner > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users > -- Melody Bliss Usenix, SAGE and LOPSA Charter Member Patron Member of the NRA _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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