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we have a CentOsS 5.5 server kernel 2.6.18-194.el5 #1 SMP.
All of the sudden we can't see the GUI, I forced the server to restart several times but it seems like Xorg is trying to start but can't, I can access the server through SSH, when i type TOP command I see that Xorg appear and disappear, in the screen I see the mouse for a while then the command line, It seems like xorg is struggling to start but i don't know how to help him starting , please give me some hints!!!
Thanks a lot for any help!
To give you hints, we need more info. What graphics hardware? Which drivers are used? Your /var/log/Xorg.0.log?
Thanks for the reply,
the hardware is : VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)
for the driver I think it's RADEON, as when i started Xorg I saw RADEON setting up the config.
the log is attached.( I did kill Xorg and started it gain, so you may find this in there).
Thank you once more!
A) Since according to the Xorg.0.log file, direct rendering isn't used, add "nomodeset" to your kernel boot option. (You can enter it to the kernel line when booting up, if it helps, add it to your grub config file /boot/grub/menu.lst or /boot/grub/grub.conf) I have found that this helps with video problems if you use NVidia or ATI graphics.
using VT number 7
The xorg.0.log file indicated that it was using VT7, while the last line you posted is saying VT 8 is being used. I wonder if using VT7 instead will help. Use the `pstree' command to locate the parent (script) process of the /usr/bin/Xorg command. There may be a setting in /etc/inittab or a file in /etc/sysconfig/ where you can make the change. (Sorry, I'm not running CentOS & am not familiar with distro specific config files)
Last edited by jschiwal; 11-30-2010 at 10:49 PM.
Reason: tree -> pstree
His kernel and Xorg are too old for modesetting to even come into play. "nomodeset" won't make a difference. I did notice that Xorg is running as server :1, which suggests that server :0 was running at some point.
To the OP, do you have a display manager (xdm/gdm/kdm) starting up when you reboot?
Thanks for your suggestions!
I did try nomodeset boot option (I did put it in the files you said like that:kernel /vmlinuz-2.6.18-194.el5 ro nomodeset root=/dev/VolGroup00/LogVol00 rhgb quiet crashkernel=128M@16M; I guess this how it should be, i've never have to do that )
however i didn't change anything as adamk75 said, still showing mouse then terminal just switching in between there.
yes I do have a gdm, I checked and it says already running.
If you mean by disabling, prevent gdm from running at startup: I tried disabling gdm using ntsysv and chkconfig but i couldn't.
but if you mean just using gdm-stop (which i don't think what you mean), I did try it but no success, I even tried to kill all gdm processes but i throws this :
root 9037 0.0 0.0 255356 4132 ? Sl 06:23 0:00 /usr/libexec/gdm-rh-security-token-helper
root 9423 0.0 0.0 255356 4124 ? Sl 06:26 0:00 /usr/libexec/gdm-rh-security-token-helper
root 10403 0.4 0.0 167600 2592 ? Ss 06:32 0:00 /usr/sbin/gdm-binary -nodaemon
root 10435 0.0 0.0 167600 1328 ? S 06:32 0:00 /usr/sbin/gdm-binary -nodaemon
root 10437 0.2 0.0 255356 4132 ? Sl 06:32 0:00 /usr/libexec/gdm-rh-security-token-helper
root 10455 0.0 0.0 3780 380 ? Ss 06:32 0:00 /usr/libexec/gdmopen -l /bin/sh -c /usr/bin/whiptail --yesno 'There already appears to be an X server running on display :0. Should another display number by tried? Answering no will cause GDM to attempt starting the server on :0 again. (You can change consoles by pressing Ctrl-Alt plus a function key, such as Ctrl-Alt-F7 to go to console 7. X servers usually run on consoles 7 and higher.)
I meant disabling gdm from starting up at all when you boot up your machine. I do not know how to do this on CentOS, frankly, but ntsysv and chkconfig do sound like the correct mechanisms.
the thing is i tried using ntsysv but i can't see it at all, i cannot even see gnome. iwth chkconfig it says smthing like not applicable or...
anybody know how to prevent gdm from starting at boot or a solution to the whole issue? please help?