@Jithin Emmanuel: I have multiple freeze bugs I think, including the one that appeared after the update to kernel 11.41. I have other freeze bugs that go back some time and therefore aren't related to recent updates.
Anyway - I can confirm that
Option "AccelMethod" "EXA"
Option "MigrationHeuristic" "greedy"
is rock-stable for me, so I'm now running that in day and experimenting with tracking my bugs down in the evening.
Note that my lockups are not specific to UXA, and happen with EXA if I omit the MigrationHeuristic option.
Mobile 945GME Express.