chris' random ramblings

I got a new Thinkpad T510 at work to replace my aging MacBook Pro. I asked for a Thinkpad instead of another MacBook because I wanted hardware with better hardware support, in particular the trackpad. I got into the habit of bringing a USB mouse everywhere I went because the trackpad on the MacBook was so unreliable on linux.

So when my new T510 arrived, I was pretty excited. And, except for one tiny problem (of the PEBKAC kind), transferring all my files from the old machine to the new one went flawlessly.

Here’s how I set up the new machine:

• Download image from sysresccd.org. Follow the instructions to make a bootable USB drive.
• Boot up computer off USB drive. Resize the existing NTFS partition to be really small. Add 2 new partitions in the new-free space: one for the boot partition for linux, and one to be encrypted and be formatted with lvm.
• Format boot partition as ext3. Setup encrypted partition with ‘cryptsetup luksFormat /dev/sda6; cryptsetup luksOpen /dev/sda6 crypt_sda6′. Setup LVM with ‘pvcreate /dev/mapper/crypt_sda6′. Setup two volumes, one for swap, and one for the root partition.
• Connect network cable between old laptop and new one. Configure local network.
• Copy files from old /boot to new /boot.
• Copy files from old / to new /. Here’s where I messed up. My command was: ‘rsync -aPxX 192.168.2.1:/ /target/’.
• Install grub.
• Reboot!

At this point the machine came up ok, but wasn’t prompting to decrypt my root drive, and so I had to do some manual steps to get the root drive to mount initially. Fixing up /etc/crypttab and the initramfs solved this.

However even after this I was having some problems. I couldn’t connect to wireless networks with Network Manager. I couldn’t run gnome-power-manager. Files in /var/lib/mysql were owned by ntp! Then I realized that my initial rsync had copied over files preserving the user/group names, not the uid/gid values. And since I wasn’t booting off a Debian image, the id/name mappings were quite different. Re-running rsync with ‘–numeric-ids’ got all the ownerships fixed up. After the next reboot things were working flawlessly.

Now after a few weeks of using it, I’m enjoying it a lot more than my MacBook Pro. It boots up faster. It connects to wireless networks faster. It suspends/unsuspends faster. It’s got real, live, page-up/page-down keys! The trackpad actually works!

I previously posted that I had problems getting my wireless device working with the new 2.6.24 kernel, running into a kernel oops in the process.

In kernels prior to 2.6.24 I used the bcm43xx driver, and let NetworkManager handle connecting to wireless networks.

I’ve since had some time to play around with 2.6.24 a bit more, and I’m happy to say wireless is working now!

Here’s what I did:
- Install b43-fwcutter
- Add b43 to /etc/modules
- Add ‘, ATTR{type}=”1″‘ after the MAC address to the line in /etc/udev/rules.d/z25_persistent-net.rules that contains your wireless device. This ensures that udev will assign the same interface name to the wireless device as it had before, which means you don’t have to reconfigure your firewall!

Last night I thought I bricked my old Linksys WRT54G wireless router. I wanted to see if the latest firmware would resolve some problems I had with my wireless connection being dropped.

After the firmware upgrade, I didn’t have the dropped connection problem any more…I had a new problem – I couldn’t connect to the router at all! No wireless access, no LAN access. The most I could do was ping it.

I decided to check out OpenWRT to see if my hardware was supported, and how one was supposed to go about flashing new firmware onto the router. Luckily the TFTP method worked, and now I’m back up and running!

Maybe it’s my imagination, but it seems like the connection is faster now…

Dear Lazy Web,

How do you identify the type of CD/DVD inserted into a CDR/RW/DVD+-RW drive in Linux? dvd+rw-mediainfo does a great job with DVDs, but is there anything equivalent for CDs? Or better yet, a single tool that tells you all you need to know about a disc in the drive?

Hope to hear from you soon,
Chris

I spent a little bit of time today looking into some of the storage solution choices out there.  I was mainly concerned with systems supported under Linux, but I didn’t limit myself to just those.

My quest started this morning when I read a post on Gizmodo: Buffalo DriveStation: Serial ATA, Fanless Design. I had heard of Buffalo Technology before, I’ve often considered buying one of their products, or something like it.  What could be better than a 2 Terabyte box that you just plug into your network and configure?  Well…The Perfect Storage Solution of course!
Continue reading Quest for the Perfect Storage Solution!

This post on Christopher Blizzard’s blog gives me some hope of improved printing on linux. While my new Epson CX4200 seems to work well for text, there are still some niggling issues like printing beyond the paper area, or clipping around margins, that make me worried about trying to print photos under linux.

It also makes me think I should change my blog’s theme to distinguish it from the other million default wordpress installations out there

I’ve written before about my experiences with printing under Linux…Initial frustration, brief elation, and then final disappointment while attempting to set up my Lexmark Z42. Eventually I gave up and either printed everything at work, or from my wife’s laptop.

A recent sales flyer from a local computer store, combined with some mail-in-rebate programs by the manufacturors convinced me that the time had come to try another printer. My in-laws purchased an all-in-one multifunction printer / scanner / copier last year and were very happy with it, and actually made good use of the copying functionality of the machine.

So the question was, which model would I buy? I knew for sure that I wouldn’t get Lexmark after my horrible experience with the Z42 last time. My instinct was justified after reading linuxprinting.org’s page on suggested printers for free software users:

There are few good free software drivers for Canon and Lexmark inkjets. Do not buy one and expect success.

The same page recommended either an Epson or HP printer, and as there was a sale on Epson printers I decided to go with Epson.

Now, which model to get? It really came down to the choice between the Epson CX4200 and the Epson CX4800. The CX4800 has the ability to put in a memory card and print directly from the card. However, since I don’t expect to be printing pictures at home at all, this feature really isn’t necessary for me. CX4200 it is then!

Setting up this printer was a snap in Linux. Actually even easier than setting it up in Windows, which is a nice change! I simply used the Gnome CUPS Manager to add a new printer, and selected mine from the list. I already had the Gutenprint v5 drivers installed, so I guess that’s where a lot of the credit for ease of installation is due.

Setting up scanning was a bit trickier. I had to manually edit some of the sane configuration files, and there seemed to be an issue where the printer module would claim exclusive access to the usb device, preventing the scanner module from working. This is apparently fixed in later versions of the drivers, but I haven’t had a chance to test it out.

The CX4200′s print quality is good for what I use it for, which is mostly just printing out e-mails, directions, recipes and things of that sort which would be time consuming to copy to paper by hand. The standalone copying functionality is very handy, I’ve used it quite a bit so far. Almost as much as printing from my computer!

So far I’m very happy with the CX4200, and at $70 (CAD) after a mail-in-rebate, the price can’t be beat.