Re: CONFIG_APM_DISPLAY_BLANK problem in the 2.5 kernel

From: Zwane Mwaikambo (
Date: Thu Jan 16 2003 - 14:54:04 EST

On Thu, 16 Jan 2003, Mikael Pettersson wrote:

> However, 2.5 kernels tend to hang the machine when the console screen
> blanker kicks in. "Tend to" as in almost but not quite always.
> Recently I found that disabling APM_DISPLAY_BLANK eliminates the hangs.
> My other boxes don't have any problems with APM_DISPLAY_BLANK, and this
> box does run 2.4 fine with APM_DISPLAY_BLANK, so it seems there must
> be some change in the 2.5 kernel's APM driver that is problematic on
> this particular box.
> and the other APM options are disabled. PCI S3 Trio64V2/DX graphics card.)

I've seen the same thing on a laptop, on my system the display just never
comes back on again, although i can still use it via a serial console or
network. I only know it was CONFIG_APM related because i can't reproduce
without it, i just never looked into it.



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