There is bug 331596 which describes a freeze when TripleBuffer is turned on, however it is triggered by sleep/resume rather than idle.
Even so, since your original config and logs were done with this set on, if you are certain your freeze is not due to this option, I'd ask that you re-upload your files after reproducing the freeze without that option set.
Also, you mention compositing. kwin I gather? Some freeze bugs occur only with that enabled, others occur regardless of how it's set. It would help us in classifying your freeze bug if you could test without compositing enabled for some time and see if that eliminates the freezing.
In the original bug report, you mentioned seeing this with mythtv. Can you reproduce the freeze with mythtv not running? This may help us classify your bug more specifically as well.
There is bug 331596 which describes a freeze when TripleBuffer is turned on, however it is triggered by sleep/resume rather than idle.
Even so, since your original config and logs were done with this set on, if you are certain your freeze is not due to this option, I'd ask that you re-upload your files after reproducing the freeze without that option set.
Also, you mention compositing. kwin I gather? Some freeze bugs occur only with that enabled, others occur regardless of how it's set. It would help us in classifying your freeze bug if you could test without compositing enabled for some time and see if that eliminates the freezing.
In the original bug report, you mentioned seeing this with mythtv. Can you reproduce the freeze with mythtv not running? This may help us classify your bug more specifically as well.