Failed to play back MIDI via sequencer

[Johnatan]

Have tried using newest sound card drivers? or switching pci bus ports (audio card)?

[David (PassMark)]

Update: June 2012.

With the help of Lenovo, who also had the MIDI playback back on their Thinkpad laptops we have got to the bottom of at least one of the causes of MIDI playback problem.

It was found there was a memory leak in the Conexant audio device drivers. After running for some time the device driver would fail.

Device: Conexant 20672 SmartAudio HD
Bad version: 8.32.23.2 or before
Good version 8.32.27.50 and after