Messages in this thread |  | | | Subject | Re: 2.6.16-rc5: known regressions [TP 600X S3, vanilla DSDT] | | Date | Thu, 16 Mar 2006 05:47:49 +0000 | | From | Sanjoy Mahajan <> |
Here the test results on the DSDT variants, as a tree. THM0 is the root (meaning a DSDT with only THM0). -XYZ means 'fake the method XYZ in THM0, relative to the situation in the parent DSDT':
hang: THM0 okay: -TMP hang: -PSV okay: -AC0 (i.e. THM0 methods but no PSV, no AC0) hang: -SCP hang: -AC0
The first two results are consistent with the view that TMP is the problem.
From the first five results, I convinced myself that TMP needed AC0 around to cause a problem, and vice versa: hang iff (TMP & AC0). But the last result (-AC0) surprised me. Now I think: hang iff (TMP & (PSV | AC0)). The -PSV-AC0 DSDT, which did not hang, seemed close to hanging. After a few cycles, it became very sluggish and the load was 8.2 on wakeup. But the sluggishness disappeared after a couple more cycles, and I couldn't produce a hang (tried two reboots, each with different permutations of sleep.sh or "echo 1 > THM0/polling_frequency"). The -AC0 DSDT hung upon doing
echo 1 > THM0/polling_frequency ; sleep.sh; sleep.sh and it got in an endless loop that showed it sluggishly executing (over and over again) THM0._TMP.
It's probably not coincidence that TMP and AC0 both use the EC. Although PSV doesn't.
I didn't make any tests on the MODP method. And the TC1, TC2, and TSP methods seemed to trivial (just returning a constant) that it didn't seem worth testing them.
I keep the kernels around for each permutation, so I can retest any of the above, or send the THM0 portions of the .dsl files.
-Sanjoy
`Never underestimate the evil of which men of power are capable.' --Bertrand Russell, _War Crimes in Vietnam_, chapter 1. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |