CentOS 5 Server :: Xen Dom0 Console Display Is Scrambled?
Dec 29, 2010
I just install xen and kernel-xen version 2.6.18-194.26.1.el5xen, booting into the xen kernel dom0 shows me continous colorful scrambling and scrolling. I can ssh to dom0 and get correct display but the dom0 console is where it shows the colorful garbage scrolling. i have the Supermicro X7DC motherboard with a XGI Z9 graphics card. GUI is not installed and I don't have the rhgb parameter in my grub.conf. My grub.conf is plain and unmodified.
#boot=/dev/md0
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
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Jul 19, 2011
I have been searching the web for a few hours and have not had any luck finding instructions on how to setup Xen HVM Dom0 on a CentOS 5.6. I have a test server with a stock install of CentOS 5.6 that support AMD-V.
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Aug 4, 2010
Problems with xen 3.1.2 creating and installing domU CentOS 5.5 I am trying to do a virt-install --prompt --paravirt, and the install error out while trying to download install RPMs. I have googled for xen centos virt-install and various permutations. I have found similar howtos for 5.4 and 5.3, but they resulted in the same outcome. I did find several posts with similar issues, but no solution was posted.[URL]..
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May 17, 2010
I'm using virtual network (NAT network) for my domU.When I change dom0's firewall setup, the domU will fail to connect to Internet anymore.So far, the only way to bring the network back is reboot dom0 !I try to restart service network and libvirtd on dom0 ... it doesn't work.How can I bring the domU network back without reboot dom0 ?
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Aug 24, 2010
I have CentOS 5.5 distribution with Dom0 and DomU installed. I try to access Dom0 files during vsftpd server from DomU during ftp client. I successfully login with root and simple user, but when I try to list (or cd to some directory) in user home the SELinux prevent it from me. I get this in audit.log:
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Apr 16, 2009
I configured the serial consol on centos5 as follows
# dmesg |grep tty
Kernel command line: ro root=/dev/VolGroup00/LogVol00 console=tty0 console=ttyS0,9600n8
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A[code]......
But I could not consol Centos server from my labtop (win xp) Is there missing or wrong configurations ?
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Dec 23, 2010
I installed a new squeeze serverXen Hypervisor runs the server as Dom0 anda virtual Windows XP.The server runs samba, postfix, dovecot, squid, cups and hylafax with a Frritz ISDN card (module fcpci.ko).The used memory of Dom0 rises slowly (about 5MB /h) until the system crashes.As a workaround i installed a reboot every 24 hours.htop shows normal behavior.The system is already in production, so i can't stop services to track this bug.I need some hints how to debug the running system to find out, where the memory gets lots.
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Feb 23, 2011
I am very new to this site. Is there a good tutorial on installing CentOS X86_64 on VMware Server Console?
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Mar 3, 2010
I use CentOS and i need to set resolution or font size so that i can see more lines of logs at a time on the main console of my CentOS box.
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Mar 16, 2011
I would like to connect via SSH or similar to my servers located in a remote DC from a laptop running centos5. I normally do this on a puter running dows, and using secureCRT. Just wondering if centos has something built in for this, or if there is some preferably free software I can get.
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Nov 19, 2010
that's my first linux server. on my root is CentOS already installed. when i connect via "Remote Desktop Viewer" i log in with my accout.
then i see the textmode and type in "startx" and "init 5" but nothing happens but i can see this:
[root@server004 ~]# startx
xauth: creating new authority file /root/.serverauth.2896
Fatal server error: Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock and start again.
Xlib: connection to ":0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
giving up.
[code]....
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Feb 8, 2010
A novice and tried to set up remote desktop from XP workstation using VNC4Server. Have lost GUI interface on server console. I tried to reverse what I did but still no display.the server boots fine then displays a window "Choose a host to connect to..." which just lists a mail server on the network.Don't know where to start looking to solve this. Any help would be appreciated.
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Feb 24, 2010
red hat How can I change the text in the console display?
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Feb 26, 2011
I've just tried to install X on my new debian system which had a nasty side effect.
I can see the bootcycle up to "Waiting for /dev to be fully populated." and then the screen switches into a display mode unsupported by my display. I've had problems like this many times before because the display returns it's capabable of resolutions like 2048x1536, which it just isnt. I've had to disable autodetection whenever using this display. One thing to note thought is that it's NOT X that's messing up the display. It's setting the wrong display mode even before the filesystems are mounted. And I've already uninstalled X with no change either. Also recovery(single user) mode has no proper display output either.
what is setting my display to the wrong mode?
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Feb 15, 2011
I've been getting messages, that should be in the dmesg log, on the console.This has been happening for a while, but I finally got tired of them.My system is Fedora release 14, Kernel 2.6.35.11-83 on an x86_64.When I reboot I get the following displayed with the login prompt.[ 52.492937] readahead-collector: starting delayed service auditd[ 52.795508] readahead-collector: sorting[ 53.033970] readahead-collector: finished
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Mar 2, 2011
I have logged as e.g. user1 via ssh into my machine. Then I perform `su -` to switch to root user and I don't see debug messages which are normally displayed when I log as root via system console.How to display console messages in ssh session ?
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Apr 21, 2010
i'm trying to send a mail with "mail" on my cent os console , but without success. In Suse it's quite simple with "mail": mail -r sendersaddress@domain -s "subject" targetaddress@domain </tmp/filewithcontent
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Jul 2, 2010
Debian Squeeze: Linux jilldando 2.6.32-trunk-486 #1 Sun Jan 10 05:53:18 UTC 2010 i686 GNU/Linux
gdm for desktop manager
I have 4 differences situations, 2 work, 2 do not: So I think my server box (Jill) is messed up.
1) On the server desktop, I can open a console as the gui logged in user and type: xeyes and those eyes appear.echo $DISPLAY :0.0
2) If from that console I log in as another user (ros) and then type:
xeyes I get:
Error: Can't open display:
echo $DISPLAY
(NOTHING)
so that will be a problem.
3) If I ssh into my offices remote server from my XP machine with putty and x-forwarding and then type:
xeyes and those eyes appear.
echo $DISPLAY
localhost:11.0
4) If I ssh into Jill from my XP machine with putty and x-forwarding and then type:
xeyes I get:
Error: Can't open display: echo $DISPLAY (NOTHING)so that will be a problem.
This leads me to think I have something messed up on my Linux box Jill.
I have tried setting DISPLAY= to various values but same error, so this led me to believe something else needs setting. Especially as env yields alot more in situation 1 than in situation 2.
What can I set where, that will allow me run xeyes (anything X) in situations 2 and 4, just like in situation 1 and 3?
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Feb 25, 2010
My console display is hard to use and read ever since I installed the ATI fglrx driver (the problem appears with any version of the driver):
ImageBam - Fast, Free Image Hosting and Photo Sharing
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Nov 9, 2010
I am having a problem getting my virtual console back after starting XWindows. The display goes blank when I press Ctrl-Alt-F1. If I press Ctrl-Alt-F7 I get the X session back. I have tried setting vga=x31A on the linux boot up. Also tried rdev -v /vmlinuz -1, and rebooted. I have tried two different monitors, same problem. One is a an LCD (Philips 170S6Fb/27, the other a Samsung Sync Master 750s. Originally the Samsung worked fine. I could switch between X and VC no problem. Now that I have the LCD monitor working after changing the XF86Config, I have this problem.
My kernel is 2.2.15-5.0, Redhat 6.2. Here is the output of lspci for the video card:
00:0c.0 VGA compatible controller: ATI Technologies Inc 3D Rage II+ 215GTB [Mach64 GTB] (rev 9a) (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc: Unknown device 4755
Flags: bus master, stepping, medium devsel, latency 0
Memory at e2000000 (32-bit, prefetchable)
I/O ports at b400
Memory at e0000000 (32-bit, non-prefetchable)
Expansion ROM at 000c0000 [disabled]
Hopefully there is someway to control how linux sets the video mode when switching consoles.
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Dec 17, 2009
I`m looking for a a X-Window in CentOS. At the moment I work with console only in text mode
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Jul 11, 2011
I'm using nfs to mount the folder /mirror from a server onto a node.
This works, except on the node the user and group are displayed as "4294967294".
On the server: ls -al ./ displays
-rw-r--r-- 1 cu cu 0 2011-07-11 15:08 test1
-rw-r--r-- 1 cu cu 0 2011-07-11 15:08 test2
whereas on the node
-rw-r--r-- 1 4294967294 4294967294 0 2011-07-11 15:08 test1
-rw-r--r-- 1 4294967294 4294967294 0 2011-07-11 15:08 test2
I have usermod and groupmod the username cu to have the same numbers on the node.
On the server: id displays
uid=1021(cu) gid=1007(cu) groups=1007(cu),109(admin)
on the node
uid=1021(cu) gid=1007(cu) groups=1007(cu)
I'm stumpeed as to what the problem could be.
I should perhaps add that the home directory is /mirror/cu (so that the users share the same account when mounted). Not sure if thats relevent though...
My /etc/exports file (on the server) looks like this
/mirror *(rw,sync)
and I do the mount (on the node) with
sudo mount server:/mirror /mirror
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May 5, 2011
I just upgraded to Ubutntu 11.04 64 bit, using the default Unity setup. Everything seems to work fine apart from labels on the dashboard, about half of them appear scrambled. When I press the Ubutnu icon on the top left some of the text is also scrambled. I have an integrated Intel graphics card.
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Apr 21, 2011
I would like to compile a custom xen dom0 kernel. I installed a Debian Squeeze with precompiled xen kernel, and it works fine, but i would like to compile a custom dom0 kernel from source. I tried install kernel source apt-get source linux-2.6 how can I patch this kernel source with xen? but i alway see only the domU kernel params.
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Dec 26, 2010
When i ssh to server using -X, i always confuse about which display number i should export. It seems to me sometimes the display number has been used by something, so what i can do is only
export DISPLAY=localhost:0 && xclock
export DISPLAY=localhost:1 && xclock
export DISPLAY=localhost:2 && xclock
[code]....
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Apr 8, 2011
Both MP4 and OGV playback completely weird on my Ubuntu 10.04.2 laptop:
The resolution/length/etc is correct, but the picture is all weird. Webm doesn't work at all.
I tried mplayer, kmplayer, smplayer, gxine, totem and kplayer. All the same.
However, the exact same video's play back normally in HTML5 pages with a bunch of browsers on the same machine. They also play back normally on a Windows machine. There is no DRM involved.
Aren't these gstreamer en mplayer based players supposed to handle this correctly?
This is an Intel Core i3 machine with Intel HD graphics.
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Aug 10, 2010
I've got a fresh install of Squeeze on a 32bit host and I have been unable to boot into XEN/dom0.The Xen Kernel is "linux-image-2.6.32-5-xen-686" (pvops) and Hypervisor is xen-hypervisor-4.0-i386.The system default installed with grub2.It boots quite happily in normal mode, using the above Kernel, but just reboots itself if I try run it as Xen/dom0. (reboots within a second of pressing <enter> ... there is no messages displayed on the screen that I have noticed)The relevant menu (generated by /etc/grub.d/20_linux_xen) entry for running Xen is as below;
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-686 and XEN 4.0-i386' --class debian --class gnu-linux --class gnu --class os --class xen {
insmod part_msdos
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Jul 29, 2010
I am using wine for a couple of programs, such as spotify and winscp. These used to work great, untill the latest wine update last week. Suddenly, the fonts are scrambled and all wine programs became unusable. I tried to reinstall my programs and to reinstall wine, but to no avail.
Here's a screenshot of spotify and wordpad:
My installed wine version is 1.2.0-1.fc12 on Fedora Core 12.
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Apr 28, 2010
I turned on screen compositing in xubuntu 9.1 and that scrambled the screen and now I can't read the screen. How do I undo that change? If I alt-ctr-F2 that goes to the command line. Then restartx goes back to the scrambled screen. Why does xubuntu recovery mode not offer any option to redo the video. Sorry, I assumed Xubuntu would ask for a confirmation like 'click yes if you can still see the screen' before allowing a change that can toast the system.
Also I tried:
metacity --replace returns Window manager error: Unable to open X display
xfwm4 --replace returns (xfwm4:145: Gtk-WARNING **: cannot open display
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Jun 13, 2010
I downloaded Fedora 13 today and tried the live cd, however, after booting my mouse was a square that is white and scrambled. I am trying the KDE version and it also has no task bar or anything other than a window with icon to install. nothing else is there.
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