Re: T580: setting brightness freezes desktop temporarily

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On Mon, Aug 3, 2026 at 2:34=E2=80=AFAM Jonathan Thornburg <dr.j.thornburg@g=
mail.com>
wrote:

> In message <https://marc.info/?l=3Dopenbsd-misc&m=3D178555157817795&w=3D1=
>,
> Veraellyunjie wrote
> > Thinkpad T580, no-nvidia version, only intel iGPU.
> > There are Fn+F5 and Fn+F6 keys to control screen brightness.
> > In Xenocara, brightness switches immediately,
> >    yet desktop freezes for about a second.
> > [[...]]
> > The Fn brightness hotkeys don't trigger keypress events in `xev`.
>
> I see identical behavior on my T580 (7.9-stable/amd64.
>

Same in L470, I've reported it maybe at start of last year



>
> --
> -- "Jonathan Thornburg [remove -color to reply]" <
> [email protected]>
>    he/him; on the west coast of Canada; https://www.bkis-orchard.net
>    "separating gullible venture capitalists from their money and spending
>     a good deal of that money on blue-sky R&D is almost always a net
>     social-welfare plus in and of itself." -- Brad Delong, 2023-04-25
>
>

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote g=
mail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Aug 3, =
2026 at 2:34=E2=80=AFAM Jonathan Thornburg &lt;<a href=3D"mailto:dr.j.thorn=
[email protected]">[email protected]</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">In message &lt;<a href=3D"https://m=
arc.info/?l=3Dopenbsd-misc&amp;m=3D178555157817795&amp;w=3D1" rel=3D"norefe=
rrer" target=3D"_blank">https://marc.info/?l=3Dopenbsd-misc&amp;m=3D1785551=
57817795&amp;w=3D1</a>&gt;,<br>
Veraellyunjie wrote<br>
&gt; Thinkpad T580, no-nvidia version, only intel iGPU.<br>
&gt; There are Fn+F5 and Fn+F6 keys to control screen brightness.<br>
&gt; In Xenocara, brightness switches immediately,<br>
&gt;=C2=A0 =C2=A0 yet desktop freezes for about a second.<br>
&gt; [[...]]<br>
&gt; The Fn brightness hotkeys don&#39;t trigger keypress events in `xev`.<=
br>
<br>
I see identical behavior on my T580 (7.9-stable/amd64.<br></blockquote><div=
><br></div><div>Same in L470, I&#39;ve reported it maybe at start of last y=
ear</div><div><br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex">
<br>
-- <br>
-- &quot;Jonathan Thornburg [remove -color to reply]&quot; &lt;<a href=3D"m=
ailto:[email protected]" target=3D"_blank">dr.j.thornburg@gmail=
-pink.com</a>&gt;<br>
=C2=A0 =C2=A0he/him; on the west coast of Canada; <a href=3D"https://www.bk=
is-orchard.net" rel=3D"noreferrer" target=3D"_blank">https://www.bkis-orcha=
rd.net</a><br>
=C2=A0 =C2=A0&quot;separating gullible venture capitalists from their money=
 and spending<br>
=C2=A0 =C2=A0 a good deal of that money on blue-sky R&amp;D is almost alway=
s a net<br>
=C2=A0 =C2=A0 social-welfare plus in and of itself.&quot; -- Brad Delong, 2=
023-04-25<br>
<br>
</blockquote></div></div>

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