blog.gauner.org

Ja ist denn schon 1. April?

Es geschehen noch Zeichen und Wunder:

• Telekom legt Glasfaseranschlüsse bis zum Endkunden
• IE9 unterstützt SVG

Using KVM/virt-manager in Debian sid is interesing. You’ll get nice and fresh errors from time to time. KVM is constantly improving but you have to deal with unexpected changes from time to time which tend to break existing VMs.

With the latest version I’ve got this error:

Error starting domain: internal error unable to reserve PCI address 0:0:3

The long text:

Traceback (most recent call last):
File “/usr/share/virt-manager/virtManager/engine.py”, line 589, in run_domain
vm.startup()
File “/usr/share/virt-manager/virtManager/domain.py”, line 1208, in startup
self._backend.create()
File “/usr/lib/python2.5/site-packages/libvirt.py”, line 317, in create
if ret == -1: raise libvirtError (‘virDomainCreate() failed’, dom=self)
libvirtError: internal error unable to reserve PCI address 0:0:3

The solution was to edit the /etc/libvirt/qemu/<domain>.xml and change the conflicting PCI id. The line looked like this before:

<address type=’pci’ domain=’0×0000′ bus=’0×00′ slot=’0×03′ function=’0×0′/>

and like that after the change:

<address type=’pci’ domain=’0×0000′ bus=’0×00′ slot=’0×02′ function=’0×0′/>

Don’t forget to reload libvirt after this change.

Since upgrading to KDE4.4 I’ve got startup errors each time Akonadi was started due to some missing MySQL system tables.

It’s easy to fix this:

akonadictl stop
mysql_install_db  --datadir=$HOME/.local/share/akonadi/db_data
akonadictl start

And don’t forget to install akonadi-kde-resource-googledata. Thanks to Trumpton.

udevinfo was renamed to/replaced by udevadm in Debian sid. Must tutorials still refer to udevinfo.

A udev rule that works on sid w/o warnings would be something like this for a garmin gps device:

# cat /etc/udev/rules.d/51-garmin.rules
ATTR{idVendor}=="091e", ATTR{idProduct}=="0003", MODE="666", SYMLINK+="GarminGPS"

Tschüß StudiVZ ich werde dich nicht vermissen. Mein Account dort ist jedenfalls Geschichte, und nein, ich habe keinen Facebook/Twitter/sonstwas Account.

eckelig: 111.000 Treffer
ekelig: 106.000 Treffer

I’ve just spent far too much time trying to install voyage linux on my new ALIX.2D13. Everything was fine, the only problem was that I did try to use GRUB and that wasn’t working. After changing to LILO it works like a charm. The problem is probably caused by a huge version gap between etch and sid. Etch has some something like 0.9x and sid 1.9x. I thought that the Voyage installer would use the shipped grub inside a chroot. Anyway, LILO works and this is fine. I have no special requirements for this box’s bootmanager. As soon as everything is set up and tested the box is going to be deployed.

The installation of voyage linux itself is covered in detail in the Getting Started guide.

Very usefull information can be found at networksoul and this chaos wiki.

I recommend picocom to connect to the serial console:

picocom –baud 38400 –flow n –databits 8 /dev/ttyUSB0

If your computer doesn’t have a serial port anymore, like mine, I recommend the LogiLink “USB2.0 to Serial Adapter” (UA0043 v.2.0). It’s cheap and works flawlessly. Another great LogiLink product I can reommend in this context is the LogiLink “USB2.0 Aluminum All-in-one Card Reader” (CR0001B v.2.0). Why I mention these two here? I find it hard to find cheap linux compatible adapters of which I know that they work on linux, so here is the information I would have like had before I bought those. The USB-Serial-Adapter is recognized as “Prolific Technology, Inc. PL2303 Serial Port”. The Card-Reader is shown as four separate drives.

I just got me some DS18S20 (1-wire Temperature sensors) and a DS2940 (1-wire to USB adapter). The first two did work like a charm, but the third one gave me CRC errors.

CRC Failed. CRC is 63 instead of 0×00

The reason was just that, after running the first two for a while, I did just disconnect them and attached the thrid one. My mistake was not to delete/re-initialize the .digitemprc. After moving the .digitemprc out of the way and re-initializing the new one the thrid one did also work.

Show all devices on the 1-wire bus:

digitemp_DS2490 -sUSB -w

Initialize the .digitemprc:

digitemp_DS2490 -sUSB -i

Read all sensors:

digitemp -sUSB -a -r750

Thanks to Marc for the hint.

Some usefull links:

• RRDTool
• Temperaturmessung mit Linux (German)

Here are some pictures of my 1-wire bus:

Quick-Note: cat /boot/initrd.img | gzip -d | cpio -i -H newc

It looks like Qt 4.6.2 is ready to upload. That means the upload of KDE 4.4 to Debian unstable should be very close.