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ArneE wrote:Falls meine Beschreibungen noch nicht deutlich genug waren: http://groups.google.de/groups?hl=de&lr ... h.it#link1 dieser Beitrag gibt die bei mir zu findenden Symptome exakt wieder.

# lspci -v
00:00.0 Host bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 03)
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, fast devsel, latency 0
Memory at e0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [e4] #09 [4105]

00:02.0 VGA compatible controller: Intel Corp. 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 03) (
prog-if 00 [VGA])
Subsystem: Micro-Star International Co., Ltd.: Unknown device 5808
Flags: bus master, fast devsel, latency 0, IRQ 10
Memory at d0000000 (32-bit, prefetchable) [size=128M]
Memory at dff80000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [d0] Power Management version 1

00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller (rev 02) (prog-if 00 [UH
CI])
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, medium devsel, latency 0, IRQ 10
I/O ports at e400

00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller (rev 02) (prog-if 00 [UH
CI])
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, medium devsel, latency 0, IRQ 11
I/O ports at e800

00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller (rev 02) (prog-if 00 [UH
CI])
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, medium devsel, latency 0, IRQ 12
I/O ports at ec00

00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller (rev 02) (prog-if 20 [EHCI])
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, medium devsel, latency 0, IRQ 11
Memory at dff7bc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] #0a [2080]

00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 82) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: dfd00000-dfdfffff

00:1f.0 ISA bridge: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) LPC Bridge (rev 02)
Flags: bus master, medium devsel, latency 0

00:1f.1 IDE interface: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) UltraATA-100 IDE Controller (rev 02) (prog-if 8a [Master
SecP PriP])
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: bus master, medium devsel, latency 0, IRQ 12
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at fc00
Memory at 1ff00000 (32-bit, non-prefetchable) [size=1K]

00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 02)
Subsystem: Micro-Star International Co., Ltd. 845PE Max (MS-6580)
Flags: medium devsel
I/O ports at 0c00

01:08.0 Ethernet controller: Intel Corp. 82801BD PRO/100 VE (CNR) Ethernet Controller (rev 82)
Subsystem: Intel Corp.: Unknown device 1039
Flags: bus master, medium devsel, latency 32, IRQ 11
Memory at dfdef000 (32-bit, non-prefetchable) [size=4K]
I/O ports at dc00
Capabilities: [dc] Power Management version 2

I just upgrade from P4 1.8G on GIGABYTE GA-8IGX (Intel 845G) to P4 2.4c on ASUS P4P800-VM and have the similar problem. My system runing RedHat 7.3 kernel 2.4.18-26.7.x. My system have only 1G RAM (2x512M DDR400). both of them set to use only 1M video ram.

I notice that the setting of difference video RAM and AGP aperture size in BIOS affected speed of system.
I see that /proc/mtrr on P4P800-VM has 6 lines and GA-8IGX has 2 lines.

GA-8IGX:
reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0x3ff00000 (1023MB), size= 1MB: uncachable, count=1

P4P800-VM:
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg01: base=0x20000000 ( 512MB), size= 256MB: write-back, count=1
reg02: base=0x30000000 ( 768MB), size= 128MB: write-back, count=1
reg03: base=0x38000000 ( 896MB), size= 64MB: write-back, count=1
reg04: base=0x3c000000 ( 960MB), size= 32MB: write-back, count=1
reg05: base=0x3e000000 ( 992MB), size= 16MB: write-back, count=1

Why a lot of region???
I try to clear all mtrr on P4P800-VM and set the new one base on GA-8IGX:

[root /]# echo "disable=5" >| /proc/mtrr
[root /]# echo "disable=4" >| /proc/mtrr
[root /]# echo "disable=3" >| /proc/mtrr
[root /]# echo "disable=2" >| /proc/mtrr
[root /]# echo "disable=1" >| /proc/mtrr
[root /]# echo "disable=0" >| /proc/mtrr
[root /]# echo "base=0x00000000 size=0x40000000 type=write-back" > /proc/mtrr
[root /]# echo "base=0x3ff00000 size=0x00100000 type=uncachable" > /proc/mtrr

Yes!! It work, My system come fast again. the new /proc/mtrr show below:
[root /]# cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0x3ff00000 (1023MB), size= 1MB: uncachable, count=1

For your 2G RAM machine. You may change size of first region from 0x40000000 (1G) to 0x80000000 (2G). The value of base and size of second region base on your video RAM setting in BIOS.

Hope this solution will work on your system too.