** Description changed:

  I may need some help gathering necessary information for this as I am
- not sure what component will be affected, I'm only guessing it is nvidea
+ not sure what component will be affected, I'm only guessing it is nvidia
  as that is the video module loaded.
  
  symptom: on changing users, only sometimes, the HDMI connected screen
  goes blank and the monitor hardware reports a resolution mismatch.
  Restarting X does not fix the problem, the only solution I've found is a
  hardware reboot.  The monitor itself only has one resolution so it
  cannot be adjusted.
  
  this is a new problem, only since upgrading to 11.10 and persists in
  12.04.1
  
  xorg.conf:
  
  Section "Monitor"
-       Identifier     "Monitor0"
-       VendorName     "Unknown"
-       ModelName      "FNI LCD TV"
-       HorizSync       15.0 - 49.0
-       VertRefresh     57.0 - 63.0
-       Option         "DPMS"
-       # HorizSync source: edid, VertRefresh source: edid
+  Identifier     "Monitor0"
+  VendorName     "Unknown"
+  ModelName      "FNI LCD TV"
+  HorizSync       15.0 - 49.0
+  VertRefresh     57.0 - 63.0
+  Option         "DPMS"
+  # HorizSync source: edid, VertRefresh source: edid
  EndSection
  
  Section "Screen"
-       Identifier     "Screen0"
-       Device         "Device0"
-       Monitor        "Monitor0"
-       DefaultDepth    24
-       Option         "TwinView" "0"
-       Option         "metamodes" "1280x768 +0+0"
-       SubSection "Display"
-               Depth       24
-       EndSubSection
+  Identifier     "Screen0"
+  Device         "Device0"
+  Monitor        "Monitor0"
+  DefaultDepth    24
+  Option         "TwinView" "0"
+  Option         "metamodes" "1280x768 +0+0"
+  SubSection "Display"
+   Depth       24
+  EndSubSection
  EndSection
  
  Section "ServerLayout"
-       Identifier     "Layout0"
-       Screen      0  "Screen0" 0 0
+  Identifier     "Layout0"
+  Screen      0  "Screen0" 0 0
  # commented out by update-manager, HAL is now used and auto-detects devices
  # Keyboard settings are now read from /etc/default/console-setup
  #     InputDevice    "Keyboard0" "CoreKeyboard"
  # commented out by update-manager, HAL is now used and auto-detects devices
  # Keyboard settings are now read from /etc/default/console-setup
  #     InputDevice    "Mouse0" "CorePointer"
-       Option         "Xinerama" "0"
+  Option         "Xinerama" "0"
  EndSection
  
  Section "Device"
-       Identifier     "Device0"
-       Driver         "nvidia"
-       VendorName     "NVIDIA Corporation"
-       BoardName      "GeForce GT 220"
-       Option  "NoLogo"        "True"
+  Identifier     "Device0"
+  Driver         "nvidia"
+  VendorName     "NVIDIA Corporation"
+  BoardName      "GeForce GT 220"
+  Option       "NoLogo"        "True"
  EndSection
  
  Xorg.0.log report:
  
  everything looks normal booting up
  
  [    46.951] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
  [    46.951] (==) NVIDIA(0): RGB weight 888
  [    46.951] (==) NVIDIA(0): Default visual is TrueColor
  [    46.951] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
  [    46.951] (**) NVIDIA(0): Option "NoLogo" "True"
  [    46.951] (**) NVIDIA(0): Option "TwinView" "0"
  [    46.951] (**) NVIDIA(0): Option "MetaModes" "1280x768 +0+0"
  [    46.951] (**) NVIDIA(0): Enabling 2D acceleration
  [    48.517] (II) NVIDIA(GPU-0): Display (FNI LCD TV (DFP-0)) does not 
support N
  VIDIA 3D Vision
  [    48.517] (II) NVIDIA(GPU-0):     stereo.
  [    48.519] (II) NVIDIA(0): NVIDIA GPU GeForce GT 220 (GT216) at PCI:2:0:0 
(GPU
  -0)
  [    48.519] (--) NVIDIA(0): Memory: 1048576 kBytes
  [    48.519] (--) NVIDIA(0): VideoBIOS: 70.16.28.00.00
  [    48.519] (II) NVIDIA(0): Detected PCI Express Link width: 16X
  [    48.519] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
  [    48.521] (--) NVIDIA(0): Connected display device(s) on GeForce GT 220 at 
PC
  I:2:0:0
  [    48.521] (--) NVIDIA(0):     FNI LCD TV (DFP-0)
  [    48.521] (--) NVIDIA(0): FNI LCD TV (DFP-0): 330.0 MHz maximum pixel clock
  [    48.521] (--) NVIDIA(0): FNI LCD TV (DFP-0): Internal Dual Link TMDS
  [    48.556] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the EDID 
fo
  r display
  [    48.556] (**) NVIDIA(0):     device FNI LCD TV (DFP-0) (Using EDID 
frequenci
  es has been
  [    48.556] (**) NVIDIA(0):     enabled on all display devices.)
  [    48.617] (II) NVIDIA(0): Assigned Display Device: DFP-0
  [    48.617] (II) NVIDIA(0): Validated modes:
  [    48.617] (II) NVIDIA(0):     "1280x768+0+0"
  [    48.617] (II) NVIDIA(0): Virtual screen size determined to be 1280 x 768
  [    48.654] (WW) NVIDIA(0): FNI LCD TV (DFP-0)'s EDID does not contain a 
maximu
  m image
  [    48.654] (WW) NVIDIA(0):     size; cannot compute DPI from FNI LCD TV 
(DFP-0
  )'s EDID.
  [    48.654] (==) NVIDIA(0): DPI set to (75, 75); computed from built-in 
default
  [    48.654] (--) Depth 24 pixmap format is 32 bpp
- [    48.654] (II) NVIDIA: Using 768.00 MB of virtual memory for indirect 
memory 
+ [    48.654] (II) NVIDIA: Using 768.00 MB of virtual memory for indirect 
memory
  access.
  [    48.661] (II) NVIDIA(0): Setting mode "1280x768+0+0"
  
  the log ends with
  
  [ 75437.139] (II) Open ACPI successful (/var/run/acpid.socket)
  [ 75440.267] (II) NVIDIA(0): Setting mode "1280x768+0+0"
  [ 75442.267] (EE) NVIDIA(GPU-0): WAIT: (E, 0, 0x857d)
  
  which is the same resolution
  
  let me know if there are further tests or logs that might be useful

** Tags added: oneiric precise

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https://bugs.launchpad.net/bugs/1090111

Title:
  HDMI reports resolution mismatch on changing users

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