ubuntu-x-swat team mailing list archive

[Geir Ove Myhr <gomyhr@xxxxxxxxx>]

Uptream has closed the bug report with NOTOURBUG status. Assuming that
the monitor is connected via a regular VGA cable (D-SUB), the monitor
actually gives an invalid EDID information, saying that it expects a
digital signal and not an analog one. Upstream requested the information
about the monitor cable, but didn't get it but found a page where it
looked like the monitor has a VGA port. There are cases where this would
be a valid EDID (for instance if using the analog part of a DVI-I
interface).

The digital bit is the first bit in byte nr. 0x14 in the EDID
information. In the EDID block from the intel-2.4 xrandr output this is
the 9th and 10th digit on the second line and is equal to 0x80 which in
binary is 1000 0000. If the 9th hexadecimal digit on the second line of
an EDID block is 8-f the display is expecting a digital signal and 0-7
indicates an analog signal. If you look at other bug reports, all other
VGA displays report analog signal (usually the 9th hex-digit is 6). For
LVDS displays (laptop displays) it is the same as in your case.

** Changed in: xserver-xorg-video-intel (Ubuntu)
   Importance: Wishlist => Medium

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: Confirmed => Invalid

-- 
[i945] i945 don't recognize 1440x900 on external monitor in jaunty
https://bugs.launchpad.net/bugs/376722
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