[ltp] Thinkpad **30 series, Linux 3.7 and brightness keys
Dave Cunningham
linux-thinkpad@linux-thinkpad.org
Fri, 5 Apr 2013 00:28:29 -0400
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I did some more digging...
I can confirm the following workaround allows full brightness control:
nox2apic kernel param
AND
In Device section of xorg.conf:
Option "RegistryDwords" "EnableBrightnessControl=3D1"
It seems to be a problem with using 64 bit, a vm, and discrete graphics
(all of which I need).
I still have other problems with suspend/resume that I need to look into
now...
On Thu, Apr 4, 2013 at 11:03 PM, Dave Cunningham <sparkprime@gmail.com>wrot=
e:
> I have a W520 (just issued by IBM as my new work laptop). I installed
> Ubuntu Quantal on it, which comes with a 3.5.0 kernel, and use of the
> brightness up key yields a very low-level hang that needs a power cycle t=
o
> fix.
>
> I also tried 3.8.5 and it was the same.
>
> I tried upgrading the bios and EC but that didn't help. I'm currently
> at 8BET60WW.
>
> I also notice hibernate and suspend don't work properly, but this could b=
e
> due to other reasons.
>
> Any known workarounds?
>
> thanks
>
>
> On Sat, Feb 23, 2013 at 4:19 AM, Yves-Alexis Perez <corsac@debian.org>wro=
te:
>
>> On jeu., 2013-02-21 at 17:42 +0000, Robin Becker wrote:
>> > If there are significant reasons to upgrade to a later bios I might
>> > reconsider.
>> > So far as I can tell they changed the splash logo customization to
>> > allow for two
>> > logos LOGO1/LOGO2.(BMP,JPG,GIF). The LOGO2 is allowed to be higher
>> > resolution,
>> > but only applies when 'OS Optimised defaults are enabled'. I get the
>> > impression
>> > that I get locked into secure boot and UEFI boot mode if I do enable
>> > the
>> > optimized defaults.
>>
>> When booting in UEFI mode with CSM disabled, you get a white on black
>> =93high res=94 Lenovo logo (not the old low-res Thinkpad logo). But that=
's
>> unrelated to secure boot beeing enabled or not.
>>
>> Regards,
>> --
>> Yves-Alexis
>>
>
>
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<div dir=3D"ltr">I did some more digging...<div><br></div><div><div>I can c=
onfirm the following workaround allows full brightness control:</div><div><=
br></div><div>nox2apic kernel param</div><div><br></div><div>AND</div><div>
<br></div><div>In Device section of xorg.conf:</div><div><br></div><div>Opt=
ion "RegistryDwords" "EnableBrightnessControl=3D1"</div=
></div><div><br></div><div style>It seems to be a problem with using 64 bit=
, a vm, and discrete graphics (all of which I need).</div>
<div style><br></div><div style>I still have other problems with suspend/re=
sume that I need to look into now...</div></div><div class=3D"gmail_extra">=
<br><br><div class=3D"gmail_quote">On Thu, Apr 4, 2013 at 11:03 PM, Dave Cu=
nningham <span dir=3D"ltr"><<a href=3D"mailto:sparkprime@gmail.com" targ=
et=3D"_blank">sparkprime@gmail.com</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">I have a W520 (just issued =
by IBM as my new work laptop). =A0I installed Ubuntu Quantal on it, which c=
omes with a 3.5.0 kernel, and use of the brightness up key yields a very lo=
w-level hang that needs a power cycle to fix.<div>
<br></div><div>I also tried 3.8.5 and it was the same.</div><div><br></div>=
<div>I tried upgrading the bios and EC but that didn't help. =A0I'm=
currently at=A08BET60WW.</div><div class=3D"gmail_extra"><br>
</div><div class=3D"gmail_extra">I also notice hibernate and suspend don=
9;t work properly, but this could be due to other reasons.</div><div class=
=3D"gmail_extra"><br></div><div class=3D"gmail_extra">Any known workarounds=
?</div>
<div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">thanks</div=
><div><div class=3D"h5"><div class=3D"gmail_extra"><br><br><div class=3D"gm=
ail_quote">On Sat, Feb 23, 2013 at 4:19 AM, Yves-Alexis Perez <span dir=3D"=
ltr"><<a href=3D"mailto:corsac@debian.org" target=3D"_blank">corsac@debi=
an.org</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div>On jeu., 2013-02-21 at 17:42 +0000, Rob=
in Becker wrote:<br>
> If there are significant reasons to upgrade to a later bios I might<br=
>
> reconsider.<br>
> So far as I can tell they changed the splash logo customization to<br>
> allow for two<br>
> logos LOGO1/LOGO2.(BMP,JPG,GIF). The LOGO2 is allowed to be higher<br>
> resolution,<br>
> but only applies when 'OS Optimised defaults are enabled'. I g=
et the<br>
> impression<br>
> that I get locked into secure boot and UEFI boot mode if I do enable<b=
r>
> the<br>
> optimized defaults.<br>
<br>
</div>When booting in UEFI mode with CSM disabled, you get a white on black=
<br>
=93high res=94 Lenovo logo (not the old low-res Thinkpad logo). But that=
9;s<br>
unrelated to secure boot beeing enabled or not.<br>
<br>
Regards,<br>
<span><font color=3D"#888888">--<br>
Yves-Alexis<br>
</font></span></blockquote></div><br></div></div></div></div>
</blockquote></div><br></div>
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