multiple "mode sensing" scans in Xorg.0.log .... ?

[Tom London]

On Wed, Apr 9, 2008 at 7:03 AM, Adam Jackson <ajackson at redhat.com> wrote:
> On Tue, 2008-04-08 at 17:02 -0700, Tom London wrote:
>  > Running on a Thinkpad X60 with Intel 945 graphics, intel driver.
>  >
>  > I notice that Xorg.0.log seems to repeat the mode sensing sequence
>  > over and over again.
>  >
>  > For example:
>  >
>  > [root at localhost ~]# grep 'DDC gathered Modelines' $_ | wc
>  >      16      96     768
>  > [root at localhost ~]#
>  >
>  > It appears to be the same "stuff" repeated 16 times.
>  >
>  > Anyone know if that is to be expected?
>
>  Yeah, expected, though certainly verbose.  That gets printed every time
>  we scan your monitor, which is at least twice as often as it needs to be
>  on startup, and then again every time something asks RANDR what the
>  current output configuration is.
>
>  I've wanted to do a patch for a while now that compares the EDID block
>  received on each successive scan with the previous one and skips the
>  verbose printout if they match.  Anyone want to beat me to it?
>
>  - ajax
>
Thanks, that explains it.

Doing 'inotail -f /var/log/Xorg.0.log' and then running a plain
'xrandr' generates 2 more 'iterates' as you described above.

tom
-- 
Tom London