Public bug reported:
Binary package hint: linux-image-powerpc
On PowerPC, G4 tibook, suspend worked fine for kernels 2.6.38-1 and earlier.
In kernel 2.6.38-8 and later (the kernels in between did not boot on PPC),
suspend fails. This appears to be because the recent kernels do not suspend
when the PMU_IOC_SLEEP is issued. This is quite easily demonstrated:
1. Create the following file (pmus.pl), lifted directly from /usr/lib
/pm-utils/pm-functions
#!/usr/bin/perl
sub PMU_IOC_SLEEP { 0x20004200; }
open PMU, "/dev/pmu" or die "open /dev/pmu: $!";
ioctl PMU, &PMU_IOC_SLEEP, 0;
On 2.6.38-1, running the perl script causes the system to suspend.
On 2.6.38-8 and later (including the current 11.10 kernel), the script
executes, but the system does not suspend.
** Affects: linux-meta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/779110
Title:
suspend fails on powerpc > 2.6.38-1 in IOCTL PMU_IOC_SLEEP
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