Hello. 1.- testgart and the glx module with AGP enabled show memory corruption errors. 2.- The AGP gart module loads under my laptop (K6-2 450Mhz, ALI M1541 chipset, 64Mb RAM). Syslog is showing the following data: Nov 3 19:31:20 localhost kernel: Linux agpgart interface v0.99 (c) Jeff Hartmann Nov 3 19:31:20 localhost kernel: agpgart: Maximum main memory to use for agp memory: 27M Nov 3 19:31:20 localhost kernel: agpgart: Detected Ali M1541 chipset Nov 3 19:31:20 localhost kernel: agpgart: AGP aperture is 64M @ 0xe0000000 Then, the glx module using AGP modes mach64_dma=3 or mach64_dma=4 shows corrupted textures, and even crashes the machine. Trying to isolate the problem, I test the program testgart (included with this mail), and it says: version: 0.99 bridge id: 0x154110b9 agp_mode: 0x1c000203 aper_base: 0xe0000000 aper_size: 64 pg_total: 6912 pg_system: 6912 pg_used: 0 entry.key : 0 entry.key : 1 Allocated 8 megs of GART memory MemoryBenchmark: 81 mb/s MemoryBenchmark: 82 mb/s MemoryBenchmark: 82 mb/s Average speed: 81 mb/s Testing data integrity (1st pass): failed on first pass! Testing data integrity (2nd pass): failed on second pass! At the same time, the syslog is dumping lines with this shape: Nov 5 18:19:50 localhost kernel: memory : c3998d60 Nov 5 18:19:50 localhost kernel: memory : c0e8fba0 The testgart doesn't fail all the time. But the kernel-memory lines shows in the syslog anyway. With the glx module, I've also seen this line into the syslog: Nov 3 19:31:20 localhost kernel: apm: get_event: Interface not connected And then, the machine is not able to power down on halt. It says "Power down" and nothing more. cat /proc/version Linux version 2.4.0-test10 (root@panoramix) (gcc version 2.95.2 20000220 (Debian GNU/Linux)) #2 Fri Nov 3 19:52:53 CET 2000 No Oops. The testgart that I've used is attatched in this mail. The output of the ver_linux script is: -- Versions installed: (if some fields are empty or look -- unusual then possibly you have very old versions) Linux panoramix 2.4.0-test10 #2 Fri Nov 3 19:52:53 CET 2000 i586 unknown Kernel modules 2.3.19 Gnu C 2.95.2 Gnu Make 3.79.1 Binutils 2.10.91 Linux C Library 2.1.96 Dynamic linker ldd (GNU libc) 2.1.96 Procps 2.0.6 Mount 2.10o Net-tools 2.05 Kbd 0.99 Sh-utils 2.0i Modules Loaded loop agpgart ppp_deflate bsd_comp ppp_async maestro soundcore ppp_generic serial_cs pcnet_cs 8390 ipt_MASQUERADE iptable_nat ip_conntrack ip_tables ds i82365 pcmcia_core nls_iso8859-1 nls_cp437 vfat fat The /proc/cpuinfo dumps: processor : 0 vendor_id : AuthenticAMD cpu family : 5 model : 8 model name : AMD-K6(tm) 3D processor stepping : 12 cpu MHz : 451.000040 cache size : 64 KB fdiv_bug : no hlt_bug : no sep_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mmx 3dnow bogomips : 901.12 The /proc/modules dumps: loop 7392 0 (autoclean) agpgart 12752 0 (autoclean) ppp_deflate 39168 0 (autoclean) bsd_comp 4160 0 (autoclean) ppp_async 6224 1 (autoclean) maestro 25360 1 (autoclean) soundcore 3664 2 (autoclean) [maestro] ppp_generic 12704 3 (autoclean) [ppp_deflate bsd_comp ppp_async] serial_cs 5616 0 (unused) pcnet_cs 11200 1 8390 6112 0 [pcnet_cs] ipt_MASQUERADE 1296 1 (autoclean) iptable_nat 12224 0 [ipt_MASQUERADE] ip_conntrack 12384 1 [ipt_MASQUERADE iptable_nat] ip_tables 9888 4 [ipt_MASQUERADE iptable_nat] ds 6608 2 [serial_cs pcnet_cs] i82365 23216 2 pcmcia_core 43392 0 [serial_cs pcnet_cs ds i82365] nls_iso8859-1 2848 1 (autoclean) nls_cp437 4352 1 (autoclean) vfat 10320 1 fat 30080 0 [vfat] The /proc/ioports dumps: 0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : keyboard 0080-008f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : fpu 0170-017f : Acer Laboratories Inc. [ALi] M5229 IDE 0170-0177 : ide1 01f0-01ff : Acer Laboratories Inc. [ALi] M5229 IDE 01f0-01f7 : ide0 02f8-02ff : serial(set) 0300-031f : pcnet_cs 0376-0376 : Acer Laboratories Inc. [ALi] M5229 IDE 0376-0376 : ide1 03c0-03df : vga+ 03e8-03ef : serial(set) 03f6-03f6 : Acer Laboratories Inc. [ALi] M5229 IDE 03f6-03f6 : ide0 03f8-03ff : serial(set) 0cf8-0cff : PCI conf1 1c20-1c3f : Acer Laboratories Inc. [ALi] M7101 PMU e000-efff : PCI Bus #01 e800-e8ff : ATI Technologies Inc 3D Rage LT Pro AGP-133 f800-f8ff : ESS Technology ES1978 Maestro 2E f800-f8ff : ESS Maestro 2E fcf0-fcff : Acer Laboratories Inc. [ALi] M5229 IDE fcf0-fcf7 : ide0 fcf8-fcff : ide1 The /proc/iomem dumps: loop 7392 0 (autoclean) agpgart 12752 0 (autoclean) ppp_deflate 39168 0 (autoclean) bsd_comp 4160 0 (autoclean) ppp_async 6224 1 (autoclean) maestro 25360 1 (autoclean) soundcore 3664 2 (autoclean) [maestro] ppp_generic 12704 3 (autoclean) [ppp_deflate bsd_comp ppp_async] serial_cs 5616 0 (unused) pcnet_cs 11200 1 8390 6112 0 [pcnet_cs] ipt_MASQUERADE 1296 1 (autoclean) iptable_nat 12224 0 [ipt_MASQUERADE] ip_conntrack 12384 1 [ipt_MASQUERADE iptable_nat] ip_tables 9888 4 [ipt_MASQUERADE iptable_nat] ds 6608 2 [serial_cs pcnet_cs] i82365 23216 2 pcmcia_core 43392 0 [serial_cs pcnet_cs ds i82365] nls_iso8859-1 2848 1 (autoclean) nls_cp437 4352 1 (autoclean) vfat 10320 1 fat 30080 0 [vfat] The lspci -vvv dumps: 00:00.0 Host bridge: Acer Laboratories Inc. [ALi] M1541 (rev 04) Subsystem: Acer Laboratories Inc. [ALi] ALI M1541 Aladdin V/V+ AGP System Controller Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- SERR- TAbort- SERR- Reset- FastB2B- 00:03.0 CardBus bridge: Texas Instruments PCI1251B Subsystem: Acer Laboratories Inc. [ALi]: Unknown device ac1f Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001 00:03.1 CardBus bridge: Texas Instruments PCI1251B Subsystem: Acer Laboratories Inc. [ALi]: Unknown device ac1f Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Reset+ 16bInt+ PostWrite+ 16-bit legacy interface ports at 0001 00:07.0 ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge [Aladdin IV] (rev 0a) Subsystem: Acer Laboratories Inc. [ALi] ALI M1533 Aladdin IV ISA Bridge Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- [disabled] [size=128K] Capabilities: [50] AGP version 1.0 Status: RQ=255 SBA+ 64bit- FW- Rate=x1,x2 Command: RQ=28 SBA+ AGP+ 64bit- FW- Rate=x2 Capabilities: [5c] Power Management version 1 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Best regards. -- Manuel Teira