** Description changed:

  Hi,
  
  I own an ADD2 card which is some kind of remote port for Intel graphics 
chipsets; it sits on the PCI-E bus; this is the one I bought:
  http://www.materiel.net/ctl/Cartes_graphiques/25588-ADD2_DVI_D_OEM.html
  
  It's connected to a LG monitor over DVI, and this setup works fine except for 
DPMS.  The monitor is perfectly DPMS capable, I tested with DVI on another 
computer, and from Xorg.log it seems DPMS support is correctly detected:
  (II) intel(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display
  
  The monitor never goes to DPMS.
  
  There are some weird (EE) lines in Xorg.log, so I'll attach it:
  ...
  (II) intel(0): I2C device "SDVOB DDC Bus:ddc2" registered at address 0xA0.
  (EE) intel(0): Unable to write to SDVOCTRL_E for SDVOB Slave 0x70.
  (EE) intel(0): Unable to write to SDVOCTRL_E for SDVOB Slave 0x70.
  ...
  
  Bye,
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation 82G33/G31/P35/P31 Express DRAM 
Controller [8086:29c0] (rev 02)
+       Subsystem: ASUSTeK Computer Inc. Unknown device [1043:8276]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation 82G33/G31 Express 
Integrated Graphics Controller [8086:29c2] (rev 02) (prog-if 00 [VGA])
+       Subsystem: ASUSTeK Computer Inc. Unknown device [1043:8276]

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No DMPS on DVI port of ADD2 card
https://bugs.launchpad.net/bugs/149430
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