Hi Riku, On Wed, 24 Oct 2007 17:03:28 +0300, Riku Voipio wrote: > 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef > 00: 01 03 82 40 5c 18 ff ff ff ff ff ff ff ff ff ff ???@\?.......... > 10: d8 a8 d7 72 24 22 ff ff ff ff ff ff ff ff ff ff ???r$".......... > 20: ff 00 ff 00 ff 00 ff 00 3c 37 3c 37 ff ff ff ff ........<7<7.... > 30: 00 00 00 00 00 f0 00 03 00 ff ff ff ff ff ff ff .....?.?........ > 40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > 50: ff ff ff ff ff ff ff ff ff ff 03 06 15 19 34 ff ..........????4. > 60: 50 02 09 00 00 00 09 89 89 30 30 10 10 33 32 00 P??...???00??32. > 70: ff ff ff ff ff ff 00 05 0a ff ff ff f5 00 ff ff .......??...?... > 80: ff ff ff ff ff ff 00 05 0a ff ff ff f5 00 ff ff .......??...?... > 90: 00 00 0d ff ff ff ff ff ff ff ff ff ff ff ff ff ..?............. > a0: 3c 32 28 1e ff ff ff ff ff ff ff ff ff ff ff ff <2(?............ > b0: 3c 32 28 1e ff ff ff ff ff ff ff ff ff ff ff ff <2(?............ > c0: ae 04 ae 04 ff ff ff ff ff ff ff ff ff ff ff ff ????............ > d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ > f0: 80 80 00 00 00 03 5b 06 c0 00 00 ff ff ff ff 1d ??...?[??......? Register 0x60 has value 0x50, meaning that both fans are in manual mode. This is _not_ the chip default according to the datasheet. Registers 0x76 and 0x86 have value 0x00, which mean PWM duty cycle at 0% for both fans. Again this is _not_ the chip default according to the datasheet. So, assuming that the dump above was really taken right after boot before the Linux kernel driver had a chance to change register values, and also assuming that the datasheet provided by Fintek is correct, this really means that Thecus are voluntarily stopping the fans at boot time. That's a pretty stupid thing to do. This doesn't imply whether we should or shouldn't start the fans at a later point, of course. But at least it explains why the fans aren't spinning at boot when the datasheet defaults suggested that they should. -- Jean Delvare
