Comment 66 for bug 855124

Hi, after getting hinted to this from the kind folks in #debian-x, I'd like to report that this does also affect radeon systems as well. I have a radeon HD5770, and somewhere around 3.0ish I started seeing this behavior too.

I'd like to confirm that the non-intel-specific patch also helps on my system, though the problem is still clearly there. Instead of a dozen (or more) 2-second stutter/hangs as the system comes up, it's a dozen half second hangs, or feels something roughly like that. But to add some objective measures, here's some "time xrandr" outputs from the different combinations of patch/xorg config:

without patch, no xorg.conf "Ignore":, 3.210
with patch, no xorg.conf "Ignore": 1.060
with patch, with xorg.conf "Ignore": 0.120
without patch, with xorg.conf "Ignore": 0.117

I'd say the last two are statistically equivalent, but there is still an obvious problem even with the patch, though it seems to be much less of one.

This is running master as of this morning, using the radeon HD5770 card connected over HDMI. The following is the "Ignore" config referenced above:

Section "Monitor"
        Identifier "DisplayPort-0"
        Option "Ignore" "True"
EndSection
Section "Monitor"
        Identifier "DVI-0"
        Option "Ignore" "True"
EndSection
Section "Monitor"
        Identifier "DVI-1"
        Option "Ignore" "True"
EndSection