DDC bus error

[Dominik Wujastyk]

I'm posting you this because of the line below
[   20.547601] [drm]   DDC: no ddc bus - possible BIOS bug - please report
to xorg-driver-ati at lists.x.org

I'm using an HP EliteBook 8740w, with Ubuntu GNU/Linux 10.10.

$ dmesg | grep drm
[   20.360825] [drm] Initialized drm 1.1.0 20060810
[   20.464324] [drm] radeon defaulting to kernel modesetting.
[   20.464327] [drm] radeon kernel modesetting enabled.
[   20.465569] [drm] initializing kernel modesetting (JUNIPER
0x1002:0x68A0).
[   20.465710] [drm] register mmio base: 0xD4400000
[   20.465712] [drm] register mmio size: 131072
[   20.465871] [drm] Clocks initialized !
[   20.466873] [drm] Detected VRAM RAM=1024M, BAR=256M
[   20.466877] [drm] RAM width 128bits DDR
[   20.467131] [drm] radeon: 256M of VRAM memory ready
[   20.467133] [drm] radeon: 512M of GTT memory ready.
[   20.467250] [drm] radeon: irq initialized.
[   20.467253] [drm] GART: num cpu pages 131072, num gpu pages 131072
[   20.468063] [drm] Loading JUNIPER Microcode
[   20.544690] [drm] ring test succeeded in 1 usecs
[   20.544890] [drm] radeon: ib pool ready.
[   20.544963] [drm] ib test succeeded in 0 usecs
[   20.547558] [drm] Radeon Display Connectors
[   20.547561] [drm] Connector 0:
[   20.547562] [drm]   LVDS
[   20.547565] [drm]   DDC: 0x6470 0x6470 0x6474 0x6474 0x6478 0x6478 0x647c
0x647c
[   20.547567] [drm]   Encoders:
[   20.547569] [drm]     LCD1: INTERNAL_UNIPHY
[   20.547570] [drm] Connector 1:
[   20.547571] [drm]   DisplayPort
[   20.547573] [drm]   HPD1
[   20.547575] [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c
0x643c
[   20.547576] [drm]   Encoders:
[   20.547578] [drm]     DFP1: INTERNAL_UNIPHY1
[   20.547579] [drm] Connector 2:
[   20.547580] [drm]   DisplayPort
[   20.547582] [drm]   HPD2
[   20.547584] [drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c
0x644c
[   20.547586] [drm]   Encoders:
[   20.547587] [drm]     DFP2: INTERNAL_UNIPHY1
[   20.547589] [drm] Connector 3:
[   20.547590] [drm]   DisplayPort
[   20.547591] [drm]   HPD3
[   20.547594] [drm]   DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458 0x645c
0x645c
[   20.547596] [drm]   Encoders:
[   20.547597] [drm]     DFP3: INTERNAL_UNIPHY2
[   20.547599] [drm] Connector 4:
[   20.547600] [drm]   VGA
[   20.547601] [drm]   DDC: no ddc bus - possible BIOS bug - please report
to xorg-driver-ati at lists.x.org
[   20.547603] [drm]   Encoders:
[   20.547605] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
[   20.858337] [drm] Internal thermal controller with fan control
[   20.858358] [drm] radeon: power management initialized
[   20.937656] [drm] fb mappable at 0xC0140000
[   20.937658] [drm] vram apper at 0xC0000000
[   20.937660] [drm] size 7258112
[   20.937662] [drm] fb depth is 24
[   20.937663] [drm]    pitch is 6912
[   21.914666] fb0: radeondrmfb frame buffer device
[   21.914667] drm: registered panic notifier
[   21.915291] [drm] Initialized radeon 2.5.0 20080528 for 0000:01:00.0 on
minor 0
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