Created attachment 28995 [details] full dmesg These two errors are visible on every single boot (they Flash by right after GRUB even though I'm booting Ubuntu with normal splash screen). I've not major problems with graphics on this machine but I use 2D only. Errors are: [ 1.933896] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-B [ 1.944881] [drm:intel_dp_i2c_init] *ERROR* i2c_init DPDDC-C I'm guessing "dp" means DisplayPort in this context but actually I've got a SyncMaster 2253BW connected using DVI on this machine G45 machine. My hw/sw versions are: 00:02.0 VGA compatible controller [0300]: Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e22] (rev 03) Linux kingfish 2.6.31-8-generic #28-Ubuntu SMP Thu Aug 27 14:42:57 UTC 2009 x86_64 GNU/Linux libdrm2 2.4.12+git20090801.45078630-0ubuntu1 xserver-xorg-video-intel 2:2.8.1-1ubuntu1 libgl1-mesa-dri 7.6.0~git20090817.7c422387-0ubuntu3 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu3 The dmesg near these errors have some other nasty errors though: [ 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
Created attachment 28996 [details] full xorg.log
This bug is a duplicate of bug 23430 but I didn't want to populate that bug report by posting my logs there: https://bugs.freedesktop.org/show_bug.cgi?id=23430 It's also been reported by another Ubuntu user here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/409361 So we know that these PCI IDs are affected for sure: 8086:2e22 8086:2a42
*** This bug has been marked as a duplicate of bug 23430 ***
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