can't start XWindows: fresh install Kubuntu 14.04 (15.10 same problem)

[Christopher Barry]

On Sat, 7 Nov 2015 19:48:30 +0100
Gregor Leskovšek <legrega at gmail.com> wrote:

>Hi! I am Gregor Leskovšek from Slovenia and need help has problem with
>xserver in Kubuntu on my new Intel S5000PSL second hand bought server.
>I can not start plasma or failsafe or get in desktop environment.
>When I login (right password) the xserver starts loading but then after
>10-15 seconds I get back login screen
>I have Radeon EAH4350 SILENT/DI/512MD2(LP) (or smth like it used from
>another (brothers) computer) and Intel S5000 PSL Xeon motherboard.
>
>I am unable to start XWINDOWS. In text mode I reinstalled plasma and
>kubuntu desktop (I do not know if there is a trick, because that
>should be a bunch of packets but it processed only few lets say 3-5, I
>did it so: sudo apt-get purge plasma-desktop kubuntu-desktop; sudo
>apt-get install plasma-desktop kubuntu-desktop)
>
>I have attached the log file.
>I think the problem is here(see the excerpt from log below ...) (but I
>am a newbie), before I managed to install Kubuntu 14.04 x64 to server,
>but I got only one VGA port without the Radeon and I had to use
>800x600 resulotion, so I could not use it, maybe also other things are
>in game - I also updated BIOS before that.
>
>[  6301.752] reporting 3 5 23 173
>[  6301.752] (II) RADEON(0): Allocate new frame buffer 2704x1050
>stride 2752 [  6301.752] (II) RADEON(0): VRAM usage limit set to
>4194303K [  6301.831] reporting 3 5 23 13
>[  6301.832] reporting 3 5 23 173
>[  6301.865] reporting 3 5 23 173
>[  6301.866] reporting 3 5 23 173
>[  6301.866] have a master to look out for
>[  6301.866] adjust shatters 0 2704
>[  6301.866] (EE)
>[  6301.866] (EE) Backtrace:
>[  6301.866] (EE) 0: /usr/bin/X (xorg_backtrace+0x48) [0x7fbe14d20848]
>[  6301.866] (EE) 1: /usr/bin/X (0x7fbe14b77000+0x1ad539)
>[0x7fbe14d24539] [  6301.866] (EE)
>2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fbe13c73000+0x10340)
>[0x7fbe13c83340] [  6301.866] (EE)
>3: /usr/lib/xorg/modules/drivers/radeon_drv.so
>(0x7fbe0e5d7000+0x1e15e) [0x7fbe0e5f515e] [  6301.866] (EE)
>4: /usr/bin/X (PixmapShareToSlave+0x24) [0x7fbe14be87c4] [  6301.866]
>(EE) 5: /usr/bin/X (RRCrtcSet+0xb05) [0x7fbe14c89755] [  6301.866]
>(EE) 6: /usr/bin/X (ProcRRSetCrtcConfig+0x358) [0x7fbe14c8a478]
>[  6301.866] (EE) 7: /usr/bin/X (0x7fbe14b77000+0x55f0e)
>[0x7fbe14bccf0e] [  6301.867] (EE) 8: /usr/bin/X
>(0x7fbe14b77000+0x59d9a) [0x7fbe14bd0d9a] [  6301.867] (EE)
>9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5)
>[0x7fbe126b3ec5] [  6301.867] (EE) 10: /usr/bin/X
>(0x7fbe14b77000+0x451ee) [0x7fbe14bbc1ee] [  6301.867] (EE)
>[  6301.867] (EE) Segmentation fault at address 0x07 [  6301.867] (EE)
>Fatal server error:
>[  6301.867] (EE) Caught signal 11 (Segmentation fault). Server
>aborting [  6301.867] (EE)
>[  6301.867] (EE)
>Please consult the The X.Org Foundation support
> at http://wiki.x.org
> for help.
>[  6301.867] (EE) Please also check the log file at
>"/var/log/Xorg.1.log" for additional information.
>[  6301.867] (EE)
>[  6302.027] (EE) Server terminated with error (1). Closing log file.
>
>Please help me, I am desperate to put my and my clients websites back
>on net. Thanks, Gregor Leskovšek from Slovenia
>
>> When the sun rises I receive and when it sets I forgive! :-)  
>http://gleskove.oreillystudent.com :-) Always warmly / S prisrčnimi
>pozdravi!
>http://lilaum.com  Gregor Leskovšek ;-)

Do you have an /etc/X11/xorg.conf file? If so, move it somewhere so it
does not get run. Also, if there is a /etc/X11/xorg.conf.d/ directory,
and there are files in it, mv that directory somewhere too.

e.g.
$ cd /etc/X11
$ sudo mv xorg.conf xorg.saved
$ sudo mv xorg.conf.d xorg.conf.d-saved

The idea is to allow X to try to completely configure itself.

either restart X or reboot and see what that does.

-C