[ltp] W500 DisplayPort Intel GMA vs Radeon 3650

[Alex Deucher]

On Wed, Jun 9, 2010 at 3:25 PM, "Marcel M=FCller" <credito@gmx.de> wrote:
>>
>> &quot;Marcel M=FCller&quot; wrote:
>> >
>> > Anyway I switched to the opensource radeon driver. This gave my indeed
>> > what I wanted for a couple of minutes. Then out a sudden (10-15 minute=
s
>> > after normal work) the internal display just got some kind of blurry
>> > effect. It's hard to describe. Thin black lines for instance are
>> > flickering blueish. The fonts are readable but it appears every 2nd ro=
w
>> > has some sort of misinformation. The background of the console window =
is
>> > not black anymore. For my eye it appears some grey color is added. =A0=
And
>> a
>> > couple of other nasty features. If I power down and start up again it =
is
>> > fine for 5-10 minutes. I suspect this might be a temperature issue. I
>> > noticed the GPU has around 60=B0 degree Celsius. =A0 Does anyone have =
an
>> idea
>> > what happens here?
>> >
>>
>> I also had heat problems with the xorg driver: my GPU was always over
>> 60=BAC,
>> even reaching 80 with something as simple as playing flash videos.
>> Switching to fglxr fixed it though. =A0I also had this strange horizonta=
l
>> screen flicker appear occasionally in the laptop's LCD, and after readin=
g
>> your post I believe it was probably caused by the heat, as also probably
>> your own flicker is.
>
> Well I contacted Lenovo and I will send my laptop in for repair. Personal=
ly I don't think software can break that. =A0I also face Moir=E9 effects on=
 the internal lcd =A0when the lines appear. On an external monitor (clone m=
ode) the screen is perfect. And a screenshot is also fine. I'm pretty sure =
the internal lcd is broken.
>
> Let's keep the fingers crossed that Lenovo won't send the laptop back not=
 repaired with the reason: Can't reproduce the issue.
>
>>
>>
>> &quot;Karsten K=F6nig&quot; wrote:
>> >
>> > Check out vga_switcheroo from 2.6.34+, your usecase fits perfectly =3D=
)
>> >
>>
>> I've been waiting to take a shot at switcheroo for a while. =A0I'm runni=
ng
>> Lucid as Marcel, and as laz^H^H stability and security conscious as I am=
,
>> I
>> want to stick to it. =A0How suicidal would it be to install 2.6.34 in Lu=
cid?
>> I've read several people mention it "works," but never with much detail,
>> and
>> I'm sure, as Murphy is, *something* must break... starting with fglrx,
>> which
>> would've to be rebuilt. =A0Has anyone here tried it?
>>
>
> If you wanna try it the Ubuntu guys already packaged it:
>
> http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-next/2010-05-26-lucid/
>
> You can also use a more current build.
>
> For me this kernel was disappointing. The temperature does not go down si=
gnificantly (maybe 1 or 2 degrees). I count on =A02.6.35. Also I couldn't g=
et vga_switcheroo working. The folder in the debug tree is not there and I =
didn't found out why. I think this is a bug in the kernel.
> However I have no new problems with this kernel, so I would say it is pre=
tty safe to test (just leave or old one in place to go back if you wan't). =
Can't tell if fglrx will like 2.6.34. I haven tried that.
>

You need enable radeon power management via sysfs.  It's not on by default =
yet.
http://lists.freedesktop.org/archives/dri-devel/2010-May/000492.html

Alex