This has been a busy week from the hardware point of view. It started with our A2 prototypes sitting in a FedEx warehouse in Anchorage, Alaska, awaiting some paperwork from Quanta, and me conducting a search for the cause of occasional SD problems in our A1 prototypes. The former was resolved by Tuesday afternoon, resulting in the delivery of the A2 motherboards by Wed. morning. The latter was shelved after running out of A1 motherboards on which to destroy the SD slot in hypothetical rework attempts. Testing is restarting on the A2s, with promising results so far --- perhaps the power supply improvements helped!
The A2s arrived with a known S3 <-> S0 (suspend/resume) power sequencing issue, and are being ECO'd, tested for basic suspend resume functionality and placed in an XO-1 case. Most have their processor serial port added, accessible by removing the LCD panel. Almost none have a working WLAN due to a hard to repair design error. More details at: http://wiki.laptop.org/go/XO_1.5_A2 So far, the tally is: 18 laptops assembled to various stages 1 w. video problems 1 that won't power up (marked as such by Quanta) 1 that wouldn't power up reliably, and now that it has been ECO's to improve the S5 -> S3 power sequencing won't power up at all... Quanta suspects bad soldering, I suspect a bug waiting to bite. 9 motherboards are still awaiting processing. Thanks to our software developers, I've got an A2 laptop sitting in front of me running Sugar as well as SD tests. On the B-phase front, the move to a daughtercard for WLAN is forcing an increase in the layer count of the motherboard. It turns out that the projected difference in price between the (lower integration) daughtercard and the (higher integration) onboard module will still cover the increased costs, even ignoring the improvement in repairability. The days of making getting any changes into the B1 prototypes (and hence into the CL1B) are almost over. I'll be spending the next week testing the SD interface on the A2s, adding automated power metering to one A2, and seeing if we can tease out the power up problems on a few laptops. Cheers, wad _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
