From: Clemens Koller <clemens.koller@anagramm.de>
To: Pavel Machek <pavel@ucw.cz>
Cc: tglx@linutronix.de, kernel list <linux-kernel@vger.kernel.org>
Subject: Re: sleepy linux 2.6.23-rc9
Date: Tue, 09 Oct 2007 01:46:46 +0200 [thread overview]
Message-ID: <470AC166.20705@anagramm.de> (raw)
In-Reply-To: <20071008220506.GE3484@elf.ucw.cz>
Pavel Machek schrieb:
> I played with powertop a bit, and found a fairly interesting failure
> mode. If I boot init=/bin/bash vga=1, I get ~2 wakeups a second, nice.
>
> When I boot init=/bin/bash vga=791 (vesa framebuffer), most wakeups
> are caused by cursor painting (I should fix that some day, I
> guess). But... the cursor blinking does not even work properly!
>
> It blinks at normal speed, then (randomly) it blinks slowly, then gets
> back to normal speed, then inserts longer delay.
Is the effect a beat that it has roughly the frequency of your Notebooks
screen refresh rate (60Hz)? (in german: Schwebung)
> The effect is so nice that I thought about youtube ;-). Thinkpad
> x60.. question is, how to debug it?
No idea... check where the register of the HW cursor blink rate
gets written? But as it seems to be so nice, please submit a patch
which enables this for all platforms. ;-)
Regards,
--
Clemens Koller
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next prev parent reply other threads:[~2007-10-08 23:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-08 22:05 sleepy linux 2.6.23-rc9 Pavel Machek
2007-10-08 23:46 ` Clemens Koller [this message]
2007-10-09 0:52 ` H. Peter Anvin
2007-10-09 4:33 ` Antonino A. Daplas
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