Охлаждение

Видимо что то активно юзает проц.

Проверь для начала загруженность системы командой "top". Потом глянька что у тебя в ACPI, есть ли директория /proc/acpi/fan , thermo или еще что нибуть в этом роде... и есть ли там в них какие нибуть файлы. Установлен ли драйвер типа цетрино или что у тебя там потдерживаеться(коенчо если потдерживаеться). А лучше зашли dmesg будем разбираться.

Linux version 2.4.26 (root@alita) (gcc version 3.3.4) #1 Срд Мар 23 19:14:01 MSK 2005
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000000dff0000 (usable)
 BIOS-e820: 000000000dff0000 - 000000000dffffc0 (ACPI data)
 BIOS-e820: 000000000dffffc0 - 000000000e000000 (ACPI NVS)
 BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
223MB LOWMEM available.
On node 0 totalpages: 57328
zone(0): 4096 pages.
zone(1): 53232 pages.
zone(2): 0 pages.
ACPI: RSDP (v000 OID_00                                    ) @ 0x000e5010
ACPI: RSDT (v001 INSYDE RSDT_000 0x00000001 _CSI 0x00010100) @ 0x0dfffbc0
ACPI: FADT (v001 INSYDE FACP_000 0x00000100 _CSI 0x00010100) @ 0x0dfffac0
ACPI: BOOT (v001 INSYDE SYS_BOOT 0x00000100 _CSI 0x00010100) @ 0x0dfffb50
ACPI: DBGP (v001 INSYDE DBGP_000 0x00000100 _CSI 0x00010100) @ 0x0dfffb80
ACPI: DSDT (v001 INSYDE   VT8372 0x00001000 INTL 0x02002025) @ 0x00000000
Kernel command line: BOOT_IMAGE=#Linux# ro root=304
Initializing CPU#0
Detected 1658.544 MHz processor.
Console: colour dummy device 80x25
Calibrating delay loop... 3309.56 BogoMIPS
Memory: 223384k/229312k available (1987k kernel code, 5540k reserved, 652k data, 136k init, 0k highmem)
Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
Inode cache hash table entries: 16384 (order: 5, 131072 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 16384 (order: 4, 65536 bytes)
Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 256K (64 bytes/line)
CPU:     After generic, caps: 0383f9ff c1cbf9ff 00000000 00000000
CPU:             Common caps: 0383f9ff c1cbf9ff 00000000 00000000
CPU: AMD mobile AMD Athlon(tm) XP-M 2000+ stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: Intel
ACPI: Subsystem revision 20040326
PCI: PCI BIOS revision 2.10 entry at 0xe8a94, last bus=1
PCI: Using configuration type 1
ACPI: IRQ9 SCI: Edge set to Level Trigger.
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: System [ACPI] (supports S0 S3 S4 S5)
ACPI: PCI Root Bridge [PCI0] (00:00)
PCI: Probing PCI hardware (bus 00)
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: Embedded Controller [EC0] (gpe 5)
ACPI: PCI Interrupt Link [LNKA] (IRQs 5 7 *10 11)
ACPI: PCI Interrupt Link [LNKB] (IRQs 5 7 10 *11)
ACPI: PCI Interrupt Link [LNKC] (IRQs *5 7 10 11)
ACPI: PCI Interrupt Link [LNKD] (IRQs 5 7 10 *11)
PCI: Probing PCI hardware
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
PCI: No IRQ known for interrupt pin A of device 00:11.1
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
PCI: Using ACPI for IRQ routing
PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off'
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16)
apm: overridden by ACPI.
Starting kswapd
VFS: Disk quotas vdquot_6.5.1
Journalled Block Device driver loaded
ACPI: AC Adapter [AC] (on-line)
ACPI: Battery Slot [BAT0] (battery present)
vesafb: framebuffer at 0x90000000, mapped to 0xce819000, size 3072k
vesafb: mode is 1024x768x16, linelength=2048, pages=19
vesafb: protected mode interface info at c000:841f
vesafb: scrolling: redraw
vesafb: directcolor: size=0:5:6:5, shift=0:11:5:0
Console: switching to colour frame buffer device 128x48
fb0: VESA VGA frame buffer device
pty: 512 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI enabled
Real Time Clock Driver v1.10f
floppy0: no floppy controllers found
RAMDISK driver initialized: 16 RAM disks of 7777K size 1024 blocksize
loop: loaded (max 8 devices)
Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 00:11.1
PCI: No IRQ known for interrupt pin A of device 00:11.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: VIA vt8235 (rev 00) IDE UDMA133 controller on pci00:11.1
    ide0: BM-DMA at 0x1100-0x1107, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0x1108-0x110f, BIOS settings: hdc:pio, hdd:DMA

вот такой вот dmesg...

Попробуй последнее ядро из ветки 2.6 там есть исправления в АСРI которых в старом нет, это во первых. Во вторых для твоего проца нужно добавит модуль CPUfreq для AMD Atlon, и конечно же демон который бы все это дело регулировал, к примеру cpufreqd.

првильно подсказывают - новое ядро и включить CPU frequency scaling и потом настроить cpudyn чтобы частоту сбрасывал в простое.

или cpufreq =)