Hi, I had reported the same problem some time back for 2.6.13 and now tried 2.6.13.1, but the problem persists. After some time (about 1 hour or so) the machine just locks hard - screen, keyboard, network. I noticed that the hard disk light is on permanently in that stage. It always locks up during disk operation (this time which installing some new Debian packages). The (currently one and only) disk is hanging off the 0000:00:07.1 VIA IDE controller, the built-in RAID controller is unused. 2.6.12.5 was running stable for a very long time (upgraded when it came out and never rebooted until 2.6.13 was released). I'm now back to 2.6.12.5 and the machine works fine again, so I doubt it's a hardware failure. There is nothing in syslog, and I can't switch to console or do Alt-SysRq, so I'm at loss how to investigate this further. Best, Norbert I append the lspci -vvv from both 2.6.12.5 and 2.6.13.1 The diff between these two is: --- 2.6.12.5/lspci 2005-09-12 14:17:56.000000000 -0700 +++ 2.6.13.1/lspci 2005-09-12 14:12:17.000000000 -0700 @@ -89,6 +89,7 @@ Interrupt: pin A routed to IRQ 10 Region 0: I/O ports at b000 [size=128] Region 1: Memory at e7000000 (32-bit, non-prefetchable) [size=128] + Expansion ROM at 40080000 [disabled] [size=128K] Capabilities: [dc] 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- @@ -115,6 +116,7 @@ Region 2: I/O ports at c000 [size=8] Region 3: I/O ports at c400 [size=4] Region 4: I/O ports at c800 [size=16] + Expansion ROM at 40000000 [disabled] [size=512K] Capabilities: [60] Power Management version 2 Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=3 PME- @@ -128,6 +130,7 @@ Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at 9000 [size=256] Region 2: Memory at e5000000 (32-bit, non-prefetchable) [size=64K] + Expansion ROM at e4000000 [disabled] [size=128K] Capabilities: [58] AGP version 2.0 Status: RQ=80 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4 Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP- GART64- 64bit- FW- Rate= =============== lspci -vvv from 2.6.12.5: =============== 0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 02) Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Capabilities: [c0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Reset- FastB2B- Capabilities: [80] Power Management version 2 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22) Subsystem: VIA Technologies, Inc. VT82C686/A PCI to 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- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:01:00.1 Display controller: ATI Technologies Inc: Unknown device 5940 (rev 01) Subsystem: Hightech Information System Ltd.: Unknown device 5961 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR- Capabilities: [c0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Reset- FastB2B- Capabilities: [80] Power Management version 2 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22) Subsystem: VIA Technologies, Inc. VT82C686/A PCI to 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- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- 0000:01:00.1 Display controller: ATI Technologies Inc: Unknown device 5940 (rev 01) Subsystem: Hightech Information System Ltd.: Unknown device 5961 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR-