[LAU] snd-hrtimer ALSA module

Has anybody successfully used the ALSA snd-hrtimer module, as present in ALSA 1.0.18a and 1.0.19? It seems to cause lock-ups in just a few seconds on a 2.6.27 kernel for me. The backstory to this is that I am trying to use Rosegarden on a 2.6.27 non-realtime kernel (a backport for Ubuntu Hardy from the kernel PPA). Rosegarden requires an ALSA timer (it cannot use /dev/rtc0 directly). The system timer-based snd-timer module works at 250 Hz (too coarse) and the traditional snd-rtctimer module is gone after 2.6.24. Therefore I tried to upgrade ALSA and use the new hrtimer module, which as reported doesn't work... As to the real-time 2.6.27 kernel, which I am sure everybody will advise me to use, it has some problems for me (including bad interactions with other drivers leading to lock-ups). Any thoughts? Thanks, Dan