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[Bug 289520] Re: GPM unresponsive for two minutes after startup on Macbooks

To: mactel-support@xxxxxxxxxxxxxxxxxxx
From: Ted Gould <ted.gould@xxxxxxxxxx>
Date: Mon, 27 Oct 2008 19:13:31 -0000
Reply-to: Bug 289520 <289520@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I don't understand why the patch has to change the type of loop being
used.  Why can't it just use the new function as the increment or
decrement functions in the for loops?  It would make the patch much
smaller.

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GPM unresponsive for two minutes after startup on Macbooks
https://bugs.launchpad.net/bugs/289520
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Status in Mactel Support: Fix Released
Status in “gnome-power-manager” source package in Ubuntu: In Progress

Bug description:
Binary package hint: gnome-power-manager

Many of the recent Apple MacBooks have a large number of LCD backlight levels. The GPM uses XRandR to modify the backlight. However, the gpm-brightness-xrandr smooth brightness function does not take the number of brightness levels into account. On recent Macbooks, this leads to some 20000 brightness-set calls on startup, an activity that takes about one and a half minute. During this time, GPM is not responsive. Attached is a patch that introduces scaled stepping, which fixes the problem.