I also see this very frequently for no apparent reason.  There always
appear two windows in very quick succession.  The first is (incorrectly)
reporting a new monitor connection event, and the second is (also
incorrectly) reporting a disconnection event.  The dialog is either "A
new monitor output has been connected." or "A monitor output has been
disconnected."

This is on a brand new installation of Kubuntu 8.10 on a Dell Latitude
E5500. The frequency of the occurrences seems to have decreased after I
did an update (of 85 packages that I didn't pay particularly close
attention to) right after initial installation, but it still happens
every 10-15 minutes.  While I was waiting for it to happen just now to
gather data for this comment, nothing happened for about five minutes,
then six windows (three connections, three disconnections) popped up
over the span of about four seconds.

When everything was sitting happily at idle, xrandr's output looks like this:
[EMAIL PROTECTED]:~$ xrandr
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 1440 x 1440
VGA disconnected (normal left inverted right x axis y axis)         
LVDS connected 1440x900+0+0 (normal left inverted right x axis y axis) 331mm x 
207mm                                                                           
 
   1440x900       59.9*+                                                        
   1360x768       59.8                                                          
   1152x864       60.0                                                          
   1024x768       60.0                                                          
   800x600        60.3                                                          
   640x480        59.9                                                          
HDMI-1 disconnected (normal left inverted right x axis y axis)                  
HDMI-2 disconnected (normal left inverted right x axis y axis)                  
TV disconnected (normal left inverted right x axis y axis)                      
[EMAIL PROTECTED]:~$ 

Once the crazy started happening, I managed to run xrandr a few times.  Some 
were normal and some were a bit nuts (but all identical).  The "connected" and 
"disconnected" dialogs appear so quickly (and steal focus, and seem to bog down 
the machine momentarily) that I'm not sure what the exact state was when I 
managed to obtain these samples.  The "nuts" version looks like this:
[EMAIL PROTECTED]:~$ xrandr
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 1440 x 1440
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1440x900+0+0 (normal left inverted right x axis y axis) 331mm x 
207mm
   1440x900       59.9*+
   1360x768       59.8
   1152x864       60.0
   1024x768       60.0
   800x600        60.3
   640x480        59.9
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)
  1024x768 (0xa7)   26.9MHz
        h: width  1024 start 1025 end 1088 total 1120 skew    0 clock   24.0KHz
        v: height  768 start  769 end  800 total  801           clock   30.0Hz
  800x600 (0xa8)   17.0MHz
        h: width   800 start  801 end  864 total  896 skew    0 clock   19.0KHz
        v: height  600 start  601 end  632 total  633           clock   30.0Hz
  848x480 (0xa9)   14.5MHz
        h: width   848 start  849 end  912 total  944 skew    0 clock   15.4KHz
        v: height  480 start  481 end  512 total  513           clock   30.0Hz
  640x480 (0xaa)   11.3MHz
        h: width   640 start  641 end  704 total  736 skew    0 clock   15.4KHz
        v: height  480 start  481 end  512 total  513           clock   30.0Hz
[EMAIL PROTECTED]:~$

How does it make any sense to provide a list of allowed configuration
settings for the TV output when it's listed as disconnected?  I do have
an s-video port on the side of the laptop (although I've never tried to
use it), and presumably that's the physical side of the "TV" output.

I have not tried checking the "Do not ask again" box because I want to
know while this bug still exists, and I will probably want to use the
feature as I plan to dock and undock a lot, using an external monitor
(although as yet this laptop has never been connected to its dock).

This system has Intel graphics.  From lspci -vv:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
        Subsystem: Dell Device 0263
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at f6c00000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at efe8 [size=8]
        Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 
Enable-
                Address: 00000000  Data: 0000
        Capabilities: [d0] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
        Subsystem: Dell Device 0263
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Region 0: Memory at f6b00000 (64-bit, non-prefetchable) [size=1M]
        Capabilities: [d0] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

I don't yet understand how all the Xorg configuration happens in 8.10.
My /etc/X11/xorg.conf is pretty barren, but searching in
/var/log/Xorg.0.log shows that it's loading the "intel" module, and that
in turn is detecting a "Mobile Intel GM45 Express Chipset", all of which
makes sense.

Hmm.  I did a reboot to ask the BIOS about the video card (it agrees, Intel 
GM45), and now the dialog isn't occurring anymore.  But I do see Xorg.0.log 
growing periodically for no apparent reason.  It looks like it's repeating the 
same lines over and over:
(II) intel(0): EDID vendor "SEC", prod id 21570
(II) intel(0): Printing DDC gathered Modelines:
(II) intel(0): Modeline "1440x900"x0.0  108.00  1440 1504 1536 1976  900 903 
906 912 +hsync -vsync (54.7 kHz)
(II) intel(0): Modeline "1440x900"x0.0  108.00  1440 1504 1536 1976  900 903 
906 912 +hsync -vsync (54.7 kHz)
(II) intel(0): EDID vendor "SEC", prod id 21570

But those lines look like they relate to LVDS (1440x900), not TV.


So that's all I've thought of to offer for now.  Let me know if you'd like more 
info.  Hopefully the problem is reproducible at that time.

-- 
annoying dialog appears "Monitor setup has changed" kde4
https://bugs.launchpad.net/bugs/296223
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