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Posts from the ‘Ubuntu’ Category

27
Apr

Ubuntu 12.04 (Precise) and AMD Catalyst 12.4

Precise Pangola has been released and a day later comes a new fglrx driver. While there isn’t a changelog, this build apparently gives us:

early-look support for Ubuntu 12.04, Linux PowerXpress support for the Intel Ivy Bridge platform, packaging script updates, and various bug-fixes.

Among the bug-fixes for Catalyst 12.4 on Linux are: fixing some multi-head issues, a system hang in certain PowerXpress configurations, fixing a system hang when using OpenGL overlays, correcting an OpenGL performance drop, a soft-hang when killing the X Server, and severe corruption for OpenGL games using the AMD “Redwood” graphics processors.

If you want to build these for yourself then you can follow these instructions:
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17
Nov

Asymmetric networking using Linux

The idea is simple, two subnets (separate networks) and then route packets from one to the other. The environment, however, is not symmetric. We wanted to contact a node on the other subnet and we could see the packets travelling over the switch to the router back through another switch to the node, but the node itself refused to reply.

Each node has two NICs and each NIC is connected to a separate network. If you try to connect or ping one node from another, Linux is smart enough to go directly over the NIC with the right network. If a NIC should ever fail, the failover is that the packets are then routed up one network to the router then over to the other network.
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14
Nov

Wireless BCM4312 3.2 kernel

Broadcom Chipset BCM4312

Since there is an Ubuntu package ‘firmware-b43-lpphy-installer’ which is up to date and will work against the 3.0 kernel, my earlier posts are obsolete. If you are not running Ubuntu, then you will still need to reference my post.

The latest 3.2 Linux kernel however has a few ABI changes, most notably in the network stack which effects the Broadcom’s wl module. Most notably is: .ndo_set_multicast_list which was replaced with .ndo_set_rx_mode.

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30
Sep

Build environments using chroot

The need was simple enough: make deb packages from source for multiple architectures on the same system. This needed to be done without the overhead of a virtual machine and without using something like launchpad.

I’ve used chroot in the past and it seemed like a perfect fit for the problem. The idea is to have at least two chroot-able directories with the bare essentials from Ubuntu Natty (10.04) to compile and build deb packages.
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1
Sep

Skype on Ubuntu 11.10 (Oneiric Ocelot)

If you upgrade to Ubuntu 11.10 on a 64-bit platform and try to run skype then you will likely get this error:

skype: error while loading shared libraries: libXss.so.1: cannot open shared object file: No such file or directory

This is because libxss1 and a few other libraries have been removed from ia32-libs package.

You will need to enable multiarch and install the extra 32 bit libraries by hand:
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