[Bug 47007] HDMI monitor polling causing 100ms rendering stalls

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=47007

--- Comment #21 from Alex Deucher <agd5f at yahoo.com> 2012-03-15 06:59:49 PDT ---
(In reply to comment #15)
> Bad news from a different motherboard. This one has DVI-D and DP connectors.
> With a DVI monitor connected stalls are still there due to the shared_ddc being
> true (DDC shared between DVI and VGA). Connectors look like this here:
> 
> [drm] Radeon Display Connectors
> [drm] Connector 0:
> [drm]   DisplayPort
> [drm]   HPD1
> [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
> [drm]   Encoders:
> [drm]     DFP1: INTERNAL_UNIPHY
> [drm] Connector 1:
> [drm]   DVI-D
> [drm]   HPD2
> [drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
> [drm]   Encoders:
> [drm]     DFP2: INTERNAL_UNIPHY
> [drm] Connector 2:
> [drm]   VGA
> [drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
> [drm]   Encoders:
> [drm]     CRT1: INTERNAL_KLDSCP_DAC1
> 

What system is this?  Most new boards don't have shared ddc setups.  Does DDC
work on both the VGA and DVI ports?  Can you send me a copy of the vbios?

(as root)
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom

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