I am having what I think is the same problem with the latest kernel
2.6.15-26-386.
Here is more information. It looks like similar hardware:
Everything was working well with my Ubuntu 6.06 computer until the upgrade
containing the new 2.6.15-26-386 kernel was installed. The boot up starts
normally until the login screen comes up. Normally there is a short drum sound
when the login screen opens but now the drum sound keeps going and going and
going. After that point the computer is unusably slow. If at the grub screen I
load the 2.6.15-25-386 kernel everything is fine.
Hardware:
Motherboard Mach speed V4MDMP KM266
AMD Sempron 2200+ Processor
512 meg memory
Spec Description
∗ Micro ATX form factor 4 layers PCB size: 24.4x22.0cm
Design
∗ VIA KM400 Memory Graphic Host Chipset (V4MDM/V4MDM)
Chipset
∗ VIA KM266Pro Memory Graphic Host Chipset (for V2MDMP)
∗ VIA VT8235 South Bridge
∗ Support 200/266/333MHz (100/133/166MHz) Front Side Bus
Clock Generator
Clock (CPU Bus clock)
∗ Support DDR200/266/333 system memory clock
∗ Support 33MHz PCI Bus clock
∗ Support AMD Athlon 600MHz∼1.4GHz processor
CPU Socket
∗ Support AMD Athlon XP 1500+~3000+ processor
∗ Support AMD Duron 600MHz~1.3GHz processor
∗ Support 200/266/333MHz (100/133/166 MHz) CPU Bus clock
∗ Reserves support for future AMD Athlon/Duron processors
∗ 184-pin DDR DIMM socket x2 support
Memory Socket
DDR200/DDR266/DDR333 SDRAM
∗ Expandable to 2GB
∗ AGP slot x1 support AGP 3.0 & 8X mode (V4MDMP/V4MDM)
Expansion Slot
∗ AGP slot x1 support AGP 2.0 & 4X mode (V2MDMP)
∗ 32-bit PCI slot x3
∗ UniChrome graphic acceleration
Integrate VGA
∗ VGA Memory share 16MB∼64MB from system memory
∗ 24-bit true-color RAMDAC up to 250MHz pixel rate
∗ Resolution up to 1920x1440
∗ Two PCI IDE controllers support PCI Bus Mastering, ATA
Integrate IDE
PIO/DMA and the ULTRA DMA 66/100/133 functions that
deliver
the data transfer rate up to 133 MB/s
∗ VIA VT6103 LAN PHY support 10/100Mbps full duplex, half
On board LAN
duplex operation
(V4MDM not support)
∗ AC’97 Digital Audio controller integrated
Audio
∗ AC’97 Audio CODEC on board
∗ Audio driver and utility included
∗ Award 2MB Flash ROM
BIOS
∗ PS/2 keyboard and PS/2 mouse connectors
Multi I/O
∗ Parallel port x1
∗ Serial port x2 (connector x1, Header x1)
∗ USB2.0 connector x2, USB2.0 headers x4 (cable option)
∗ Audio connector (Line-in, Line-out, MIC & Game Port)
--
After installing the latest Linux kernel with Update Manager, Gnome start not
normal.
https://launchpad.net/bugs/52649
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