I have an Adaptec 2906 SCSI card installed in a G4 tower. This is the sort of thing that happens when I boot just about any kernel except for 2.4.20-pre5-ben0: (this output was from trying out 2.4.23-pre5-ben0, precompiled from ppckernel.org):
SCSI Subsystem driver Revision 1.00 Machine check in kernel mode. Caused by (from SRR1=49030): Transfer error ack signal --Bill --------------------------------------------------------------------------------------------- 00:0b.0 Host bridge: Apple Computer Inc.: Unknown device 002d Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- Latency: 16, cache line size 08 Capabilities: [80] AGP version 1.0 Status: RQ=7 SBA+ 64bit- FW+ Rate=x1,x2 Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none> 00:10.0 VGA compatible controller: ATI Technologies Inc Rage 128 PF (prog-if 00 [VGA]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B- Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 255 (2000ns min), cache line size 08 Interrupt: pin A routed to IRQ 48 Region 0: Memory at 94000000 (32-bit, prefetchable) [size=64M] Region 1: I/O ports at 802400 [size=256] Region 2: Memory at 90000000 (32-bit, non-prefetchable) [size=16K] Expansion ROM at 90020000 [disabled] [size=128K] Capabilities: [50] AGP version 2.0 Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2 Command: RQ=0 SBA+ AGP- 64bit- FW- Rate=<none> Capabilities: [5c] 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- 10:0b.0 Host bridge: Apple Computer Inc.: Unknown device 002e Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR- Latency: 16, cache line size 08 10:12.0 SCSI storage controller: Adaptec AHA-7850 (rev 03) Subsystem: Adaptec AHA-2904/Integrated AIC-7850 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 16 (1000ns min, 1000ns max), cache line size 08 Interrupt: pin A routed to IRQ 52 Region 0: I/O ports at 0400 [disabled] [size=256] Region 1: Memory at 80083000 (32-bit, non-prefetchable) [size=4K] 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- ********************************************************************** This email was brought to you by the Mutt E-Mail Client (www.mutt.org) and Debian GNU/Linux (www.debian.org) **********************************************************************