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AMD Radeon and no driver?
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Budoka
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Joined: 03 Jun 2012
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Location: Tokyo, Japan

PostPosted: Thu Oct 06, 2016 1:56 am    Post subject: Reply with quote

NeddySeagoon wrote:
Budoka,

Look in /var/log/Xorg.0.log.

I've not had anything to do with AMD/Intel Hybrids. However, early hardware really had two completely independent graphics systems with an electronic switch at the output, called a multiplexer. The multiplexer cost money, took up both space and power and as it is in the video path, degraded the image.
The multiplexer needs the kernel module VGA Switcheroo to control it and it can only be switched when Xorg is not running.

Later systems, called muxless, do not have this multiplexer. Now, the more powerful graphics system is only half a graphics system. With the multiplexer gone, it has no connections to the display surface.
In low power/performance mode, the Intel graphics does everything.
In high power/performance mode. The Intel graphics chip reads the pixel buffer to the display, so you still see the display and the AMD/nVidia chip renders the image into the shared pixel buffer..

With a muxless system, attempting to use the high performance GPU alone always results in a blank screen as it has no way to drive the display.
The two graphics systems must co-operate.


Thanks Neddy! It seems like it is working!
https://paste.pound-python.org/show/0sezYFlugwUDmAGfBJBJ/
https://paste.pound-python.org/show/Xe1rstlIF4CZ5hfBtPOo/

Also, thank you for the detailed explanation. I think that you may have done the same when I was initially setting up my system years ago but it was beyond my comprehension at that time...but now I "get it".
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jserink
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Joined: 30 Jan 2004
Posts: 944

PostPosted: Thu Oct 06, 2016 3:30 am    Post subject: Reply with quote

plasmonics wrote:
I agree with Vulgar that amd cards are garbage. I always use nvidia on my homebuilt desktop. emerge nvidia-drivers works everytime. My laptop came with amd. AMD gpu is extemely difficult to set up now that amd no longer supports the catalyst driver.


This comments is nonsense and not very helpful.

Why not just be honest and state that you have not dedicated the time to get the opensource radeon driver working so you are unsure about AMD cards?

That is the truth, saying the AMD/ATI cards are garbage is pure hyperbole.

My ONLY criterion on purchasing a laptop for work or anything else is ATI display card because I ONLY use open source drivers, period.

Your comment is ridiculous.

John
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Zucca
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Joined: 14 Jun 2007
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Location: KUUSANKOSKI, Finland

PostPosted: Thu Oct 06, 2016 10:12 am    Post subject: Reply with quote

First thing I add to AMD wikipages is that people should avoid using catalyst because it's obsoloted by manufacturer.
I just need to get into the mood to edit them. :P

jserink wrote:
My ONLY criterion on purchasing a laptop for work or anything else is ATI display card because I ONLY use open source drivers, period.
... although older Nvidias work ok with Nouveau.
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Zucca
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PostPosted: Fri Oct 07, 2016 7:15 pm    Post subject: Reply with quote

Well. Feeling lazy still. But I managed, at least, to create a note at the start of the page about the deprecated Catalyst drivers: https://wiki.gentoo.org/wiki/Radeon.
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