Public bug reported:
Binary package hint: linux-image-2.6.22-14-sparc64
After experiencing random hangs with Gutsy on several Sun Blade 150's
(which require ide dma to be turned off for stability), it appears that
the Gutsy kernel, on sparc64 at least, is not recognizing the
"ide=nodma" parameter when passed to the kernel at boot time.
If I boot dapper with ide=nodma (2.6.15 kernel), and run hdparm on
/dev/hda, it shows using_dma=0. On the other hand, when Gutsy is booted
with ide=nodma, hdparm shows that using_dma=1.
Looking at the syslog shows that "ide=nodma" was indeed passed to the
kernel, even though dma is turned on.
In the case of the dapper kernel, there is an acknowledgment of dma
being forced off in the syslog. In the case of the Gutsy kernel, there
is no such acknowledgment in the syslog.
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
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Sparc64 Gutsy Kernel not recognizing ide=nodma
https://bugs.launchpad.net/bugs/159152
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