2003-03-06 16:39:10

by David Shepard

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Subject: Missing keypress when ACPI enabled

Since about 2.5.60, the first 2.5 kernel that has built/booted for me, I've noticed X/Kscreensaver fails to capture a keystroke after about 20 minutes of inactivity, in the password login prompt. It is only the first keypress that is lost, all later keypresses work fine. I believe I've narrowed it down to an interaction with having ACPI enabled, as booting the kernel with 'acpi=off' seems to make the problem go away. I've attached dmesg and .config output. Please let me know if I can assist further.

Regards,
David Shepard

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Attachments:
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dmesg.fullACPI (9.56 kB)
dmesg.diff (5.61 kB)
.config (18.96 kB)
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2003-03-06 17:14:27

by Andrew Grover

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Subject: RE: Missing keypress when ACPI enabled

> From: [email protected] [mailto:[email protected]]
> Since about 2.5.60, the first 2.5 kernel that has
> built/booted for me, I've noticed X/Kscreensaver fails to
> capture a keystroke after about 20 minutes of inactivity, in
> the password login prompt. It is only the first keypress that
> is lost, all later keypresses work fine. I believe I've
> narrowed it down to an interaction with having ACPI enabled,
> as booting the kernel with 'acpi=off' seems to make the
> problem go away. I've attached dmesg and .config output.
> Please let me know if I can assist further.

Aha, you have an IBM A20 (or similar). You are not the first one to
report this, and indeed this happens on my T20, even under Windows.
Given that, I would suspect this is a side effect of some unknown IBM
BIOS enhancement, so I don't know what we can do without IBM telling us
more about what's going on.

Regards -- Andy

2003-03-06 21:55:52

by Pavel Machek

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Subject: Re: Missing keypress when ACPI enabled

Hi!

> Since about 2.5.60, the first 2.5 kernel that has built/booted for
> me, I've noticed X/Kscreensaver fails to capture a keystroke after
> about 20 minutes of inactivity, in the password login prompt. It is
> only the first keypress that is lost, all later keypresses work
> fine. I believe I've narrowed it down to an interaction with having
> ACPI enabled, as booting the kernel with 'acpi=off' seems to make
> the problem go away. I've attached dmesg and .config output. Please
> let me know if I can assist further.

Be happy (and keep your lines < 70 columns): HP omnibook locks up
randomly when you type on keyboard, and pressing power button is
needed to unlock it.

Pavel
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]