And here the output of get-edid:
Performing real mode VBE call
Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
Function supported
Call successful
VBE version 300
VBE string at 0xc01b8 "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.
axel@zeus:~/Downloads$ more edid
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:ff
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
Identifier "JC198D"
VendorName "HSD"
ModelName "JC198D"
# Block type: 2:0 3:ff
# Block type: 2:0 3:fd
HorizSync 30-83
VertRefresh 50-76
# Max dot clock (video bandwidth) 140 MHz
# Block type: 2:0 3:fc
# 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:ff
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
EndSection
The monitor is attached to the DVI port. HDMI port is not connected.
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https://bugs.launchpad.net/bugs/601376
Title:
2.6.35-6.9 (and newer) kernels having issues with invalid EDID info
and ATI Radeon graphics
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