I have Linux-Mint-5.0 installed right now. LinuxMint-5.0 is based on Ubuntu 8.04 and my computer runs just fine with this CPU. I have never had any BIOS issues or CPU cooling problems. I have even used this cpu with FreeBSD & OpenSolaris. No problems what so ever. Eventually, I'll move up to dual cpu's from AMD or Intel. But for now the budget sensitive AMD Sempron chip is very Linux friendly. If your on a budget and need a linux kernel friendly inexpensive CPU consider this one.

Here are the specifications about this CPU:
General

Product Type Processor:
Type AMD Sempron 2600+ Processor:
Processor number 2600+
Processor socket Socket 754
Clock speed 1.6 GHz
Core voltage 1.4 V
Level 1 cache size 128 KB Processor

Thermal Specification:
69 °C

Architecture:
Features HyperTransport technology, Streaming SIMD extensions 2, Integrated memory controller, 3DNow!

Professional technology Cache Memory:
Installed Size L2 cache - 128 KB Expansion
Connectivity:
Expansion Slots Total (Free) None Compatible Slots 1 x Processor - Socket 754

Miscellaneous:
Cache technology Pipeline Burst