Comment 28 for bug 127008

xresprobe seems to work different for laptop and crt/lcd. For laptop it seems to do DDC and xprobe, for lcd/crt only DDC.

If I run xresprobe with XRESPROBE_DEBUG=1 set, I get:
laptop: yes; ddc:
attempting an X probe
forking Xorg
id:
res: 1024x768
freq:
disptype: lcd/lvds
id:
res: 1024x768
freq:
disptype: lcd/lvds
not removing temporary xprobe directory /tmp/xprobe.8963; please do this by hand.
(and a lot of empty lines)

I think the x probe is only done if $RES is not set? Would that make your patch for bug 144956 more relevant?