Yes, I can confirm that:

linux-source-2.6.22 (2.6.22-11.33) gutsy; urgency=low
   [Ben Collins]
   * libata: Default to hpa being overridden

broke the kernel for us. I did a custom kernel build from the latest
ubuntu linux-source-2.6.22 (2.6.22-12.39) with the default configuration
and the problem still exists. But if I do the following change:

+++ linux-source-2.6.22-2.6.22/drivers/ata/libata-core.c
@@ -89,15 +89,15 @@
 module_param_named(fua, libata_fua, int, 0444);
 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
 
-static int ata_ignore_hpa = 1;
+static int ata_ignore_hpa = 0;
 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
 
which is the exactly revert from the linux-source-2.6.22_2.6.22-11.33.diff, all 
problems are gone and my system starts in a normal way.

-- 
Cannot start from dmraid device anymore
https://bugs.launchpad.net/bugs/141435
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