copying (possibly) useful log data out of the duplicate bug: If I boot with the newest kernel 2.6.20-10.17, linux won't boot. I get the following errors:
ATA: abnormal status 0x7F on port 0x40CF ATA: abnormal status 0x7F on port 0x40CF ATA: abnormal status 0x7F on port 0x40CF ata1.01: qc timeout (cmd 0x27) ata1.01: failed to set xfermode (err_mask=0x40) ata1.01: limiting speed to PIO0 ata1: failed to recover some devices, retrying in 5 secs ATA: abnormal status 0x7F on port 0x40CF ATA: abnormal status 0x7F on port 0x40CF ATA: abnormal status 0x7F on port 0x40CF ata1.01: qc timeout (cmd 0x27) ata1.01: failed to set xfermode (err_mask=0x40) ata1.01: disabled scsi1: ata_piix ATA: abnormal status 0x7F on port 0x40C7 hda: ATAPI 24x DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.20 Done. Check root= bootarg cat /proc/cmdline or missing modules, devices: cat /proc/modules ls /dev ALERT! /dev/disk/by-uuid/228d13f9-92fd-4569-836b-9c7f75cb94c6 does not exist. Dropping to a shell. with kernel 2.6.20-9.16 I can boot without problems. Though I get three "ATA: abnormal mode" lines as well, but it still finds the HD: [ 5.044000] ata1: SATA max UDMA/133 cmd 0x40C8 ctl 0x40E6 bmdma 0x40A0 irq 20 [ 5.044000] ata2: SATA max UDMA/133 cmd 0x40C0 ctl 0x40E2 bmdma 0x40A8 irq 20 [ 5.044000] scsi0 : ata_piix [ 5.208000] ATA: abnormal status 0x7F on port 0x40CF [ 5.220000] ATA: abnormal status 0x7F on port 0x40CF [ 5.244000] ata1.01: ATA-8, max UDMA/100, 234441648 sectors: LBA48 NCQ (depth 0/32) [ 5.244000] ata1.01: ata1: dev 1 multi count 16 [ 5.268000] ata1.01: configured for UDMA/100 [ 5.268000] scsi1 : ata_piix [ 5.432000] ATA: abnormal status 0x7F on port 0x40C7 [ 5.432000] scsi 0:0:1:0: Direct-Access ATA FUJITSU MHW2120B 0081 PQ: 0 ANSI: 5 I'm running a MacBook Pro 15" with Feisty. old_toby ProblemType: Bug Architecture: i386 Date: Wed Mar 14 19:41:53 2007 DistroRelease: Ubuntu 7.04 Uname: Linux landroval 2.6.20-9-generic #2 SMP Mon Feb 26 03:01:44 UTC 2007 i686 GNU/Linux -- 2.6.20-10 regression from 2.6.20-9, Macbook Pro no longer boots https://launchpad.net/bugs/91940 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs