Video color-space range for DVI-only (“DVI-only” means only one display is connected, and it is to the DVI output) outputs is erroneously set to standard mode (16-235) instead of extended mode (0-255).
A new detection feature to apply Standard CSC mode to TV outputs (including NTSC, PAL, 480i, and 576i), included DVI-only outputs by mistake.
Note: The driver correctly applies extended mode to analog outputs, and
standard mode to TV outputs (including NTSC, PAL, 480i, and 576i). A future driver release will correct this and apply the extended-mode color space to DVI-only outputs.
You can work around this issue by forcing either standard or extended mode
as follows:
1 Launch regedit and determine the current primary display card by
looking in HKey_Local_Machine\Hardware\DeviceMap\Video
and note the GUID (global unique identifier assigned by Windows),
which is the long string in brackets { } at the end of the entry ʺ\device\video0ʺ.
2 Look in HKey_Local_Machine\SYSTEM\CurrentControlSet\Control\Video\
{GUID}\0000 where {GUID} is the number derived from the previous step.
3 Open the ʺ0000ʺ directory and create a new DWORD called VMRCCCSStatus and give it a value of
0x3 - to force use of the standard YUV range of 16-235
0x1 - to force use of the extended YUV range of 0-255
A l'epoque ou j'avais lu ce bug, les release notes comportait un tout different message, surtout quand a sa correction ... http://www.homecinema-fr.com/forum/viewtopic.php?p=169627153#169627153
Et puis il y a eu ca aussi: http://www.homecinema-fr.com/forum/viewtopic.php?p=169928823#169928823
Du coup, je ne les avais pas mis a jour. Desole Jean-Max de ne pas t'en avoir parle plus tot, ca m'etait completement sorti de la tete
Vos resultats de colorimetrie/gamma tiennent-ils bien compte de cela?