Hello, I am using lucid, with an sata expresscard on a dell inspirion 9400 : -> lspci | grep Exp 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01) 00:1c.3 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 4 (rev 01) * I suppose the bug is maybe related to "hd on a expresscard" : can you confirm ? because the bug happen after x second when i plug in a device ( an external hd ) : then it stop working. A * And the expresscard is rarelly recognise when booting ubuntu, but sometimes yes ... SO here is what i get with , pciehp.pciehp_force=1. [ 4950.803872] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 [ 4950.805161] acpiphp: Slot [1] registered [ 5195.528097] ata3: failed to stop engine (-5) [ 5196.032105] ata4: failed to stop engine (-5) [ 5196.032322] ahci 0000:0d:00.0: PCI INT A disabled [ 5196.936742] pci 0000:0d:00.0: reg 24 32bit mmio: [0x000000-0x001fff] [ 5196.936774] pci 0000:0d:00.0: reg 30 32bit mmio pref: [0x000000-0x00ffff] [ 5196.936878] pci 0000:0d:00.0: PME# supported from D3hot [ 5196.936900] pci 0000:0d:00.0: PME# disabled [ 5196.937266] pata_jmicron 0000:0d:00.1: no hotplug settings from platform [ 5196.937272] pata_jmicron 0000:0d:00.1: using default PCI settings [ 5196.937310] pci 0000:0d:00.0: no hotplug settings from platform [ 5196.938355] ahci 0000:0d:00.0: enabling device (0000 -> 0002) [ 5196.938381] ahci 0000:0d:00.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19 [ 5196.952231] ahci 0000:0d:00.0: AHCI 0001.0000 32 slots 2 ports 3 Gbps 0x3 impl SATA mode [ 5196.952236] ahci 0000:0d:00.0: flags: 64bit ncq pm led clo pmp pio slum part [ 5196.952261] ahci 0000:0d:00.0: setting latency timer to 64 [ 5196.952543] scsi6 : ahci [ 5196.952901] scsi7 : ahci [ 5196.953092] ata7: SATA max UDMA/133 abar m8192@0xecd00000 port 0xecd00100 irq 19 [ 5196.953098] ata8: SATA max UDMA/133 abar m8192@0xecd00000 port 0xecd00180 irq 19 [ 5197.273107] ata8: SATA link down (SStatus 0 SControl 300) [ 5197.884149] ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 5197.890528] ata7.00: ATA-8: SAMSUNG HD203WI, 1AN10002, max UDMA/133 [ 5197.890546] ata7.00: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA [ 5197.897143] ata7.00: configured for UDMA/133 [ 5197.912435] scsi 6:0:0:0: Direct-Access ATA SAMSUNG HD203WI 1AN1 PQ: 0 ANSI: 5 [ 5197.912937] sd 6:0:0:0: Attached scsi generic sg2 type 0 [ 5197.913350] sd 6:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) [ 5197.913489] sd 6:0:0:0: [sdb] Write Protect is off [ 5197.913495] sd 6:0:0:0: [sdb] Mode Sense: 00 3a 00 00 [ 5197.913579] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 5197.914375] sdb: sdb1 [ 5197.927150] sd 6:0:0:0: [sdb] Attached SCSI disk [ 5261.000169] ata7.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen [ 5261.000181] ata7.00: failed command: READ FPDMA QUEUED [ 5261.000203] ata7.00: cmd 60/08:00:58:0b:60/00:00:00:00:00/40 tag 0 ncq 4096 in [ 5261.000206] res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) [ 5261.000212] ata7.00: status: { DRDY } [ 5261.000221] ata7: hard resetting link [ 5262.533360] ata7: failed to resume link (SControl 49) [ 5263.036088] ata7: failed to reset engine (errno=-5) [ 5263.200165] ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 49) [ 5268.200313] ata7.00: qc timeout (cmd 0xec) [ 5268.704115] ata7.00: failed to IDENTIFY (I/O error, err_mask=0x4) [ 5268.704123] ata7.00: revalidation failed (errno=-5) [ 5268.704146] ata7: hard resetting link [ 5270.237063] ata7: failed to resume link (SControl 49) [ 5275.780151] ata7: failed to reset engine (errno=-5) [ 5275.944153] ata7: SATA link up 1.5 Gbps (SStatus 113 SControl 49) [ 5275.944176] ata7.00: link online but device misclassifed [ 5285.944118] ata7.00: qc timeout (cmd 0xec) [ 5286.448826] ata7.00: failed to IDENTIFY (I/O error, err_mask=0x4) [ 5286.448835] ata7.00: revalidation failed (errno=-5) [ 5286.448859] ata7: limiting SATA link speed to 1.5 Gbps [ 5286.448867] ata7: hard resetting link [ 5287.980268] ata7: failed to resume link (SControl 49) [ 5288.144209] ata7: SATA link up 1.5 Gbps (SStatus 113 SControl 49) [ 5288.144222] ata7.00: link online but device misclassifed [ 5318.147804] ata7.00: qc timeout (cmd 0xec) [ 5318.649076] ata7.00: failed to IDENTIFY (I/O error, err_mask=0x4) [ 5318.649081] ata7.00: revalidation failed (errno=-5) [ 5318.649086] ata7.00: disabled [ 5318.649109] ata7.00: device reported invalid CHS sector 0 [ 5318.649131] ata7: exception Emask 0x40 SAct 0x0 SErr 0x800 action 0x6 frozen t4 [ 5318.649135] ata7: SError: { HostInt } [ 5318.649141] ata7: hard resetting link [ 5320.184048] ata7: failed to resume link (SControl 51) [ 5320.184093] ata7: SATA link down (SStatus 0 SControl 51) [ 5320.184129] ata7: EH complete [ 5320.184163] sd 6:0:0:0: [sdb] Unhandled error code [ 5320.184177] sd 6:0:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [ 5320.184181] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 60 0b 58 00 00 08 00 [ 5320.184194] end_request: I/O error, dev sdb, sector 6294360 [ 5320.184211] Buffer I/O error on device sdb1, logical block 786539 [ 5320.184276] sd 6:0:0:0: [sdb] Unhandled error code [ 5320.184279] sd 6:0:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [ 5320.184283] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 60 0b 58 00 00 08 00 [ 5320.184304] end_request: I/O error, dev sdb, sector 6294360 [ 5320.184308] Buffer I/O error on device sdb1, logical block 786539 [ 5320.219702] sd 6:0:0:0: [sdb] Unhandled error code [ 5320.219717] sd 6:0:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [ 5320.219722] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 5d c9 20 00 00 08 00 [ 5320.219735] end_request: I/O error, dev sdb, sector 6146336 [ 5320.219751] Buffer I/O error on device sdb1, logical block 768036 [ 5320.219784] sd 6:0:0:0: [sdb] Unhandled error code [ 5320.219786] sd 6:0:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [ 5320.219790] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 5d c9 20 00 00 08 00 [ 5320.219811] end_request: I/O error, dev sdb, sector 6146336 [ 5320.219815] Buffer I/O error on device sdb1, logical block 768036 [ 5345.504288] sd 6:0:0:0: [sdb] Unhandled error code [ 5345.504292] sd 6:0:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [ 5345.504297] sd 6:0:0:0: [sdb] CDB: Read(10): 28 00 00 5d c9 20 00 00 08 00 [ 5345.504321] end_request: I/O error, dev sdb, sector 6146336 [ 5345.504326] Buffer I/O error on device sdb1, logical block 768036 ETC ETC ... ... If you have other suggestions, please help