Multi Monitor Errors - cannot open display

akovia · 2011-03-31 01:46:01

Hi,
I've searched and searched for help on this but I can't find anything similar. I had everything seemingly working using my dual monitor setup until I started to look into wallpapering my desktop/s. My setup appears to just clone my laptop display, but I noticed I had a second display device under the background tab.

Monitor 1 (VGA-0) - Monitor 2 (LVDS)

I figured it was smarter than me and decided to try and use different backgrounds for each display, which I did using an image list, but only for a single display before I got distracted setting up my audio. In working on my audio I had to reboot, which is when the problems started. It took my a while to narrow it down as I was making changes to my audio at the time. Regardless, now it loads horribly slow while logging in now.

Symptoms:
After logging in after a reboot, the display goes white instead of the normal grayish color, then the cursor and the mouse logo blink heavily.
Sometimes I get and error about the panel losing focus and my tray apps don't all load, let alone my session. If it does finish loading minutes later it is terribly sluggish and apps lock up.
25+ instances of xfdesktop running

.xsession-errors:
Maximum number of clients reached
(xfdesktop:2286): Gtk-WARNING **: cannot open display: :0.0 <--- Tons of these
(tilda:3398): Gdk-WARNING **: XID collision, trouble ahead <--- Ditto
** (xfwm4:2086): WARNING **: Another Window Manager is already running
xfdesktop[2198] is already running; assuming --reload <--- Same

...and lots of others I don't know how to troubleshoot. Happy to post whole thing but didn't want to spam it.

I've since disabled wallpaper on both monitors, but no joy. The only thing that works is unplugging the second monitor.

Is there any way to unplug the second monitor and reset the settings back to stock somehow? I woulda backed up the files, but didn't know what files the interface was editing when I made the changes. I've since learned I should back up the entire xconf folder.

I'm really at wits end here and hope I can find some guidance. I just don't want to further bugger things up.

Thanks,
Ako

Almost forgot =/
Xfce 4 Desktop Environment
version 4.6.1 (Xfce 4.6)
Xubuntu 10.04 (Lucid) 2.6.32-30-generic SMP i686 GNU/Linux

Last edited by akovia (2011-03-31 01:59:25)

akovia · 2011-03-31 14:14:27

I've done a lot more reading and realized that my default monitor seems to be wrong. I was wondering what LVDS meant, but assumed that it was my external monitor as it was listed as monitor 2. I've also searched on how to set the default monitor in xfce, but this seems to be a running problem for others who want to use an extended desktop and can't get the layout right. I just prefer a clone as I had it. Most solutions I've read so far involve the use of xorg.conf, but from my research and a look inside mine, it's been replaced by the use of KMS. KMS says you can delete the xorg.conf and it will still work fine, so I'd like to stay away from a solution for now that involves editing it, as it was working fine before and I just want to repair what went wrong.

I've read the info at wiki.ubuntu.com/X/KernelModeSetting, but can't find anything relevant. I searched for the radeon-kms.conf file referenced, but I don't seem to have one. I've also read about Xandr and some GUIs for it that have helped people but I really want to stay away from installing software that just may amplify an existing problem. So if the default monitor problem isn't causing my other problems, it's still something that needs fixed and may be a good starting point but I can't find any solid information on how set the default.

A look at the Xorg.0.log isn't revealing the answer to me. It seems like the VGA is being detected as the monitor which is correct.

A snippet from the following Xorg.0.log:

(II) RADEON(0): Output VGA-0 using monitor section Configured Monitor

Shortened Xorg.0.log:

(**) |-->Screen "Default Screen" (0)
(**) |   |-->Monitor "Configured Monitor"
(**) |   |-->Device "Configured Video Device"
.
(II) Primary Device is: PCI 01@00:00:0
(II) [KMS] Kernel modesetting enabled.
(WW) Falling back to old probe method for vesa
(WW) Falling back to old probe method for fbdev
(II) Loading sub module "fbdevhw"
(II) LoadModule: "fbdevhw"
(II) Loading /usr/lib/xorg/modules/linux/libfbdevhw.so
(II) Module fbdevhw: vendor="X.Org Foundation"
    compiled for 1.7.6, module version = 0.0.2
    ABI class: X.Org Video Driver, version 6.0
(II) RADEON(0): Creating default Display subsection in Screen section
    "Default Screen" for depth/fbbpp 24/32
(==) RADEON(0): Depth 24, (--) framebuffer bpp 32
(II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
(==) RADEON(0): Default visual is TrueColor
(==) RADEON(0): RGB weight 888
(II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
(--) RADEON(0): Chipset: "ATI Radeon Mobility X600 (M24) 3150 (PCIE)" (ChipID = 0x3150)
(II) RADEON(0): PCIE card detected
(II) RADEON(0): KMS Color Tiling: disabled
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: Searching for BusID pci:0000:01:00.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: drmOpenMinor returns 8
drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0
(II) RADEON(0): Output VGA-0 using monitor section Configured Monitor
(II) RADEON(0): Output LVDS has no monitor section
(II) RADEON(0): Output S-video has no monitor section
(II) RADEON(0): EDID for output VGA-0
(II) RADEON(0): Manufacturer: SAM  Model: 254  Serial#: 1146106418
(II) RADEON(0): Year: 2006  Week: 38
.
(II) GLX: Initialized DRI2 GL provider for screen 0
.
(II) RADEON(0): Output VGA-0 connected
(II) RADEON(0): Output LVDS connected
(II) RADEON(0): Output S-video disconnected
(II) RADEON(0): Using exact sizes for initial modes
(II) RADEON(0): Output VGA-0 using initial mode 1680x1050
(II) RADEON(0): Output LVDS using initial mode 1680x1050

Could someone please at least point me in the right direction if they know? If I'm asking wrong, or not searching for relevant information properly I'd be happy to find the information myself, but so far I just end up in an endless loop of outdated information, or information that's over my head. I've spent hours reading but don't feel any further along.

Here is some more information that may or may not be relevant:

HP zd8000 Laptop
Samsung 225BW External Monitor

Video card from Xorg.0.log:
(--) PCI:*(0:1:0:0) 1002:3150:103c:3082 ATI Technologies Inc M24 1P [Radeon Mobility X600] rev 0, Mem @ 0xc0000000/268435456, 0xb0100000/65536, I/O @ 0x00004000/256, BIOS @ 0x????????/131072

Xandr output:

@XuBu:~$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 4096 x 4096
VGA-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1680x1050      60.0*+
   1280x1024      75.0     60.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1680x1050      60.4 +   60.0* 
   1600x1024      60.2  
   1400x1050      60.0     60.0  
   1280x1024      59.9     60.0  
   1440x900       59.9     59.9  
   1280x960       60.0     59.9  
   1280x854       59.9  
   1360x768       59.8  
   1280x800       59.8  
   1152x864       60.0  
   1280x720       59.9  
   1152x768       59.8  
   1024x768       60.0     59.9  
   800x600        60.3     59.9  
   848x480        59.7  
   720x480        59.7  
   640x480        59.9     59.4  
S-video disconnected (normal left inverted right x axis y axis)

Thnx,
Ako

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#1 2011-03-31 01:46:01

Multi Monitor Errors - cannot open display

#2 2011-03-31 14:14:27

Re: Multi Monitor Errors - cannot open display

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