Comment 17 for bug 409361

Confirm on intel G45 using latest karmic bits as of 29th Aug (have seen the error on every boot for more than a month now):
[ 1.933896] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-B
[ 1.944881] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-C

The dmesg just before those errors are:
[ 1.901688] agpgart-intel 0000:00:00.0: Intel G45/G43 Chipset
[ 1.903191] agpgart-intel 0000:00:00.0: detected 32764K stolen memory
[ 1.906008] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000
[ 1.918992] [drm] Initialized drm 1.1.0 20060810
[ 1.925547] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 1.925551] i915 0000:00:02.0: setting latency timer to 64
[ 1.928312] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining
[ 1.928314] [drm] MTRR allocation failed. Graphics performance may suffer.
[ 1.928524] alloc irq_desc for 26 on node 0
[ 1.928526] alloc kstat_irqs on node 0
[ 1.928532] i915 0000:00:02.0: irq 26 for MSI/MSI-X
[ 1.933896] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-B
[ 1.944881] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-C
[ 1.972387] i2c-adapter i2c-1: unable to read EDID block.
[ 1.972389] i915 0000:00:02.0: DVI-D-1: no EDID data

Card:
00:02.0 VGA compatible controller [0300]: Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e22] (rev 03)

2D:
2:2.8.1-1ubuntu1

libdrm-intel1:
2.4.12+git20090801.45078630-0ubuntu1

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I assume that the "DP" in intel_dp_i2c_init] means DisplayPort? I've got my SyncMaster 2253BW connected through DVI though.