Comment 121 for bug 1063354

Hi there,

I am running Ubuntu 12.04 LTS on three machines:

1. An intel xeon with an asus motherboard, 32GB RAM, SSD (SAMSUNG older model)
2. An Lenovo Thinkpad 201s i7, 8GB RAM, SSD (Crucial)
3. An Lenovo Thinkpad W510 i7 720, 8GB RAM, SSD (Samsung EVO)

All systems are running under kernel 3.11 (linux-image-generic-lts-saucy , 3.11.0.15.14)

/etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

/etc/modprobe.d/options: EMPTY

The #3 (W510) randomly freezes with the following errors:
ata1: SATA max UDMA/133 abar m2048@0xf2627000 port 0xf2627100 irq 54
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
ata1.00: ATA-9: Samsung SSD 840 EVO 500GB, EXT0BB0Q, max UDMA/133
ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
ata1.00: configured for UDMA/133
[...]

These errors occur up to 5-10 times, then the SSD is set to readonly state like this:

ata1: EH complete
ata1: limiting SATA link speed to 1.5 Gbps
ata1.00: exception Emask 0x52 SAct 0x1 SErr 0x1a80d00 action 0x6 frozen
ata1.00: irq_stat 0x08000000, interface fatal error
ata1: SError: { UnrecovData Proto HostInt 10B8B BadCRC LinkSeq TrStaTrns }
ata1.00: failed command: READ FPDMA QUEUED
ata1.00: cmd 60/08:00:d8:b9:27/00:00:05:00:00/40 tag 0 ncq 4096 in
ata1.00: status: { DRDY }
ata1: hard resetting link
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)

---------------------------------

i am now trying the following settings:

/etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash libata.force=noncq"

/etc/modprobe.d/options: options libata noacpi=1

/etc/default/tlp (which was on standard setting until now)

# Hard disk advanced power management level: 1(max saving)..254(off)
# Levels 1..127 may spin down the disk.
# Separate values for multiple devices with spaces.
DISK_APM_LEVEL_ON_AC="254 254"
DISK_APM_LEVEL_ON_BAT="254 254"

# SATA aggressive link power management (ALPM):
# min_power/medium_power/max_performance
SATA_LINKPWR_ON_AC=max_performance
SATA_LINKPWR_ON_BAT=max_performance

I will write ... after further testing.

Please note: system #1. and #2. are running without any problems!