Quote:
Originally Posted by Peakcrew
Right, I can confirm the Mk1 Touch has the same problem. Three nights, three reductions of 50% +/- 5% with the beam-breaker on the screen just after manual sleep.
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Interesting indeed. I'd already had mine replaced of course and I was loathe to press my father into giving up reading his for a week just so I could run some tests, so thanks. The intermittent issue I had with my Mk1 not entering power off was what opened this can of worms for me. It would neatly tie that observation into the (consistently) poor battery life when sleeping the Mk2. As I've previously said I always ensure I invoke sleep manually before closing the case. But when it was meant to slip into power off the case was already shut of course.
I hope you're making note of this dear Kobo representatives and that your own tests concur with our observations. Some official response or comment would be appreciated here to at least acknowledge that this is being looked into. I'm sure you'll agree that to have the device display "Sleep" if it's still polling the screen (and possibly other activity) is highly undesirable and needs to be fixed.
And while you're at it, why not regress the kernel version to 2.6.34 or at least some other version that doesn't have known power deficiencies (Phoronix).
Extract (my emphasis):
"With this expanded round of power testing, the Linux 2.6.37 to Linux 2.6.38 regression is still shown, but it also uncovered a very noticeable differentiation in power consumption between the Linux 2.6.34 and 2.6.35 kernels too. Under idle on this test system, it equates to a 20% difference in power consumption and then the 2.6.37/2.6.38 regression tacks on another 6% in this particular test profile."
A 20% power improvement for simply choosing the previous kernel version is a no-brainer surely?