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List:       opensuse
Subject:    Re: [solved] Bug 1200983 - mouse & keyboard not available after a reboot
From:       mh () mike ! franken ! de
Date:       2023-06-25 17:08:58
Message-ID: 2687373.mvXUDI8C0e () transformer
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On Sonntag, 25. Juni 2023 13:30:43 CEST mh@mike.franken.de wrote:
> Hi @all,
> 
> perhaps this can help others too:
> 
> For a few months now I had Bug 1200983 "mouse & keyboard not available after
> a reboot (needs replug the devices)"
> (https://bugzilla.suse.com/show_bug.cgi? id=1200983) on my Tumblewed
> installation:
> I first thought, it only would affect mouse & keyboard in KDE, but after a
> while I saw, that it also happened in the Linux console.
> 
> The behaviour was like this:
> 
> 1. During boot the keyboard was usable as expected - one could chose the
> kernel to boot, enter the LUKS passphrase and so on.
> 2. As soon as the system was up, the keyboard lights went off.
> 3. The next, and only the next keypress in the console was ignored then.
> 4. After the second keypress the keyboard lights went on and one could use
> the keyboard again.
> 5. After a few seconds without keyboard usage the lights were switched off
> again and everything restarted at no 3.
> 6. When switching to the sddm login screen, the mouse also was "paralyzed".
> 7. Unplugging the keyboard and plugging it in again solved this problem.
> From then on keyboard and mouse worked as expected.
> 
> In the last few days I found enough time to analyze the problem thoroughly.
> I installed a second Tumbleweed system. This one didn't show the problem.
> So I compared /etc, running services and so on.
> After disabling powertop, mouse and keyboard worked as expected after a
> reboot.
> So: The culprit was powertop!
> 
> I don't understand fully, what was going on there.
> The pitfall is, that now my fans are running more often, so I suspect the
> system is using more power, which in turn will cause a lower battery
> runtime.
> 
> Bye.
> Michael.

I also tested with powertop running, but disabled tunables for mouse, keyboard 
and the usb hub, they are connected - to no avail.
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