At the January Linux Workshop several people needed their systems updated. New versions of Linux Mint and SUSE were loaded. Experiments were done with other distros so each machine had multiple systems loaded . So a lot of discussing current events in the Linux world while we waited for installs to finish.
The other project was to figure out how to downgrade FireFox on Ubuntu. FireFox 9 broke a plugin but there appears to be no way to downgrade back to FireFox 8 on Ubuntu. Apparently all the older versions of FireFox have been removed from the repositories. The older version can be downloaded and installed manually but the requirement is for a simple maintainable way to install so old laptops can be supplied to kids with the kid friendly FireFox plugin. The plugin is just a version of a Windows app that uses IE so now the challenge will be to see if that app will run in wine. Maybe we’ll have an answer by next month.
from carl on February 16th, 20120 Comments
Last August I went on a business trip to Silicon Valley and the day after I arrived my laptop, a MacBook Pro, died. When I pushed the power button the fans would spin and the optical drive would do a seek but there was nothing on the screen. About 1 out of 3 times I could hear the startup gong. I could plug it into a network and ssh into the laptop so I knew the machine was running – just nothing on the screen. I tried an external monitor but there was nothing there either.
So I searched the net and tried all the standard resetting of the PRAM, booting from dvd and anything I could but there was no change. So I bought a new Lenovo laptop, installed Linux and restored all my personal files from backups over the network from home. Very slow but within two days I had a working laptop and continued with my work.
After five more months I still wasn’t happy with my new laptop. I had everything I needed working but there were a bunch of little annoyances. So I decided to spend an afternoon trying to resurrect my MacBook Pro. I started by going to ifixit.com for some pointers on disassembling and checking on things.
I had the small philips screw driver and the torx driver but I didn’t have a spudger (and really had never heard of it). But I was able to use a small flat blade screw driver very carefully and managed.
First I opened it and tried removing/moving/replacing the ram modules just to make sure – do the easy things first even if they aren’t likely to do anything. Then I tried checking any and all connectors – disconnect, reconnect and test again. I followed all the cables that had anything to do with video to see if maybe one was broken. After checking all of this there still was no change in the behavior.
After some more searching it seemed like the last thing to try was to reflow the solder on the GPU. There were several videos about doing this both specifically for the MacBook Pro and for video cards in general.
Since the laptop was useless as it was I had nothing to lose. So I continued the disassembling until I had the main logic board free. There were lots of screws and many tiny little connectors to all the other bits in the case. I was fairly sure it would never work again because I doubted my ability to get everything connected correctly again but I pushed on. I cleaned all the heat sink compound off the cpu, gpu and interface chips. Using the heat gun at our soldering station, I heated the the little board holding the gpu onto the logic board focusing on any solder joints I could see. After ten minutes of this it seemed like the solder I could see was a little shinier and the board was certainly hot. So I started the long process of assembling the laptop again. Getting all the little connectors on top of the logic board and reconnected was quite a tedious process. Then getting all the screws back was also lots of fun. I tried keeping the screws generally laid out in groups by where they came from but there was still a lot of hunting for a hole that the screw would fit in. But eventually I had it all back together with no left over parts.
Now the moment of truth. It was late and time to go home so I waited until everything was back together and plugged in. Then I pushed the power button and the startup gong sounded. Then wonder of wonders, the screen lit up and the system booted all the way up. I was able to login and the system was working perfectly! Several days later and everything is still fine.
So for a few hours work I have a my laptop back.
from carl on February 1st, 20120 Comments
This was a project I saw on the web called Squishy Circuits. The idea is to make a dough like substance that will conduct electricity. Then you can mold it into interesting shapes and incorporate electrical components into the sculpture without putting wires inside. Connecting things does not require using a soldering iron – you just stick a wire into the dough.
Light the Lights
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from carl on August 24th, 20110 Comments