I confirm also with linux-rt the bug still remains.
The frequency is less than with -generic, but still appears.
syslog below.
Dec 22 19:55:07 my2912071352 kernel: [ 752.997361] ata1.01: exception Emask
0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Dec 22 19:55:07 my2912071352 kernel: [ 752.997385] ata1.01: cmd
a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Dec 22 19:55:07 my2912071352 kernel: [ 752.997388] cdb 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
Dec 22 19:55:07 my2912071352 kernel: [ 752.997391] res
40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Dec 22 19:55:07 my2912071352 kernel: [ 752.997398] ata1.01: status: { DRDY }
Dec 22 19:55:12 my2912071352 kernel: [ 758.047278] ata1: link is slow to
respond, please be patient (ready=0)
Dec 22 19:55:17 my2912071352 kernel: [ 763.045278] ata1: device not ready
(errno=-16), forcing hardreset
Dec 22 19:55:17 my2912071352 kernel: [ 763.045294] ata1: soft resetting link
Dec 22 19:55:17 my2912071352 kernel: [ 763.295740] ata1.00: configured for
UDMA/100
Dec 22 19:55:17 my2912071352 kernel: [ 763.336566] ata1.01: configured for
UDMA/33
Dec 22 19:55:17 my2912071352 kernel: [ 763.339693] ata1: EH complete
--
Regression Sata hard disk unable to mount after upgrade 2.6.27 generic kernel
https://bugs.launchpad.net/bugs/279693
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