Created attachment 15357 [details] xorg log file System Environment: -------------------------- --Platform:G33 --Architecture: 32-bit and 64-bit --2D driver: git commit:d72e18c10995079121eded758a60ed99b5b8ce1a --3D driver: Mesa master commit: f7cfc51b057d9d2fa109b32796b992e8f4f3bfcc --DRM: git commit:d18c2c684229ec6923e1a578ae837f34e6b97422 --Xserver: git commit:afd7428690d87097117ab20335658f6d59d60103 --Kernel: 2.6.23 Bug Description: I connect a 20 inch widescreen to G33 machine. then xrandr -q only get following mode values: Screen 0: minimum 320 x 200, current 1024 x 768, maximum 2048 x 2048 VGA connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0*+ 800x600 60.3 640x480 59.9 Reproduce steps: xrandr -q
would you please provide more info according to http://www.intellinuxgraphics.org/how_to_report_bug.html? thanks.
(In reply to comment #1) > would you please provide more info according to > http://www.intellinuxgraphics.org/how_to_report_bug.html? thanks. > No need for this bug, the problem is our driver can't get the EDID data with our two G33 machine. It's still unclear why I2C fails on these two machines. Thanks, Hong
I've found the root cause of the problem. The VGA cable we are using is too long, this causes the bit error on the i2c bus when transferring the EDID data. Changing to a short VGA cable solves the problem.
(In reply to comment #3) > I've found the root cause of the problem. > The VGA cable we are using is too long, this causes the bit error on the i2c > bus when transferring the EDID data. > Changing to a short VGA cable solves the problem. So unusual problem,hehe.Good Job!
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