Comment 3 for bug 378501

Hi,
 The logs seem to show a lot of errors that look like disk related errors:

May 19 21:58:49 ubuntu kernel: [ 438.344060] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
May 19 21:58:49 ubuntu kernel: [ 438.344076] ata1.00: cmd 35/00:80:cf:0f:34/00:00:70:00:00/e0 tag 0 dma 65536 out
May 19 21:58:49 ubuntu kernel: [ 438.344079] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
May 19 21:58:49 ubuntu kernel: [ 438.344086] ata1.00: status: { DRDY }
May 19 21:58:54 ubuntu kernel: [ 443.384032] ata1: link is slow to respond, please be patient (ready=0)
May 19 21:58:59 ubuntu kernel: [ 448.368020] ata1: device not ready (errno=-16), forcing hardreset
May 19 21:58:59 ubuntu kernel: [ 448.368034] ata1: soft resetting link
.....
May 19 21:59:59 ubuntu kernel: [ 508.472519] ata1: SRST failed (errno=-16)
May 19 21:59:59 ubuntu kernel: [ 508.472531] ata1: reset failed, giving up
May 19 21:59:59 ubuntu kernel: [ 508.472535] ata1.00: disabled
May 19 21:59:59 ubuntu kernel: [ 508.472552] ata1: EH complete
May 19 21:59:59 ubuntu kernel: [ 508.472590] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
May 19 21:59:59 ubuntu kernel: [ 508.472598] end_request: I/O error, dev sda, sector 1882460111
May 19 21:59:59 ubuntu kernel: [ 508.472606] Buffer I/O error on device sda1, logical block 1882460048
May 19 21:59:59 ubuntu kernel: [ 508.472610] lost page write due to I/O error on sda1

May 19 21:59:59 ubuntu kernel: [ 508.472871] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
May 19 21:59:59 ubuntu kernel: [ 508.472877] end_request: I/O error, dev sda, sector 1882718287
May 19 21:59:59 ubuntu kernel: [ 508.473035] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK

I suggest you check the cabling in your computer and possibly find some diagnostic programmes for your disk to see if a hardware problem is the cause.