[radeon] EDID checksum is invalid

Hi

3.2.0-rc3-00015-gaaa0b4f

dmesg |egrep "drm|radeon"

Command line: root=/dev/sda2 radeon.modeset=1 ro Kernel command line: root=/dev/sda2 radeon.modeset=1 ro [drm] Initialized drm 1.1.0 20060810 [drm] radeon kernel modesetting enabled. radeon 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 radeon 0000:01:00.0: setting latency timer to 64 [drm] initializing kernel modesetting (RV730 0x1002:0x9490 0x174B:0xE100). [drm] register mmio base: 0xF5000000 [drm] register mmio size: 65536 radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used) radeon 0000:01:00.0: GTT: 512M 0x0000000020000000 - 0x000000003FFFFFFF [drm] Detected VRAM RAM=512M, BAR=256M [drm] RAM width 128bits DDR [drm] radeon: 512M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. radeon 0000:01:00.0: irq 46 for MSI/MSI-X radeon 0000:01:00.0: radeon: using MSI. [drm] radeon: irq initialized. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] Loading RV730 Microcode [drm] PCIE GART of 512M enabled (table at 0x0000000000040000). radeon 0000:01:00.0: WB enabled [drm] ring test succeeded in 0 usecs [drm] radeon: ib pool ready. [drm] ib test succeeded in 0 usecs [drm] Radeon Display Connectors [drm] Connector 0: [drm] VGA [drm] DDC: 0x7e20 0x7e20 0x7e24 0x7e24 0x7e28 0x7e28 0x7e2c 0x7e2c [drm] Encoders: [drm] CRT2: INTERNAL_KLDSCP_DAC2 [drm] Connector 1: [drm] HDMI-A [drm] HPD2 [drm] DDC: 0x7f10 0x7f10 0x7f14 0x7f14 0x7f18 0x7f18 0x7f1c 0x7f1c [drm] Encoders: [drm] DFP2: INTERNAL_UNIPHY1 [drm] Connector 2: [drm] DVI-I [drm] HPD1 [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c [drm] Encoders: [drm] CRT1: INTERNAL_KLDSCP_DAC1 [drm] DFP1: INTERNAL_UNIPHY [drm] Internal thermal controller with fan control [drm] radeon: power management initialized [drm] fb mappable at 0xE0142000 [drm] vram apper at 0xE0000000 [drm] size 5242880 [drm] fb depth is 24 [drm] pitch is 5120 fbcon: radeondrmfb (fb0) is primary device fb0: radeondrmfb frame buffer device drm: registered panic notifier [drm] Initialized radeon 2.12.0 20080528 for 0000:01:00.0 on minor 0

At boot time: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 206 Raw EDID: 27 0f 01 03 80 26 1e 78 2a de 95 a3 54 4c 99 26 0f 50 54 bf ef 80 81 80 81 40 71 4f 01 01 01 01 01 01 01 01 01 01 30 2a 00 98 51 00 2a 40 30 70 13 00 78 2d 11 00 00 1e 00 00 00 fd 00 38 4b 1e 51 0e 00 0a 20 20 20 20 20 20 00 00 00 fc 00 53 79 6e 63 4d 61 73 74 65 72 0a 20 20 00 00 00 ff 00 48 53 47 59 39 30 37 30 33 32 0a 20 20 00 59 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128 Raw EDID: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Few days after that: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 38 Raw EDID: 30 2a 00 98 51 00 2a 40 30 70 13 00 78 2d 11 00 00 1e 00 00 00 fd 00 38 4b 1e 51 0e 00 0a 20 20 20 20 20 20 00 00 00 fc 00 53 79 6e 63 4d 61 73 74 65 72 0a 20 20 00 00 00 ff 00 48 53 47 59 39 30 37 30 33 32 0a 20 20 00 59 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Card is ATI Technologies Inc RV730XT [Radeon HD 4670] [1002:9490] (prog-if 00 [VGA controller])

get-edid |parse-edid

get-edid: get-edid version 2.0.0

Performing real mode VBE call Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0 Function supported Call successful

VBE version 300 VBE string at 0xc01dc "ATI ATOMBIOS"

VBE/DDC service about to be called Report DDC capabilities

Performing real mode VBE call Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0 Function supported Call successful

Monitor and video card combination does not support DDC1 transfers Monitor and video card combination supports DDC2 transfers 0 seconds per 128 byte EDID block transfer Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called Read EDID

Performing real mode VBE call Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0 Function supported Call successful

parse-edid: EDID checksum passed.

# EDID version 1 revision 3 Section "Monitor" # Block type: 2:0 3:fd # Block type: 2:0 3:fc Identifier "SyncMaster" VendorName "SAM" ModelName "SyncMaster" # Block type: 2:0 3:fd HorizSync 30-81 VertRefresh 56-75 # Max dot clock (video bandwidth) 140 MHz # Block type: 2:0 3:fc # Block type: 2:0 3:ff # DPMS capabilities: Active off:yes Suspend:no Standby:no

Mode "1280x1024" # vfreq 60.020Hz, hfreq 63.981kHz DotClock 108.000000 HTimings 1280 1328 1440 1688 VTimings 1024 1025 1028 1066 Flags "+HSync" "+VSync" EndMode # Block type: 2:0 3:fd # Block type: 2:0 3:fc # Block type: 2:0 3:ff EndSection