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What are the benefits if fglrx / AMD catalyst driver was working for Fedora with Wayland?

asked 2014-02-19 01:58:27 -0600

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So I've done some reading.

Apparently Fedora and AMD Catalyst driver is a no-no

Basically, it's installable but has problems because of Wayland. So it's hassle. A hassle I don't know the benefits of.

Anyway I just recently (as of December 2013) switched my desktop to Fedora 20. I don't know what really are the benefits?

  • is there a performance benchmark with and without the driver?
  • is there features or better heat / batter management?
  • any other benefits i can't think of?
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Check this page http://wiki.x.org/wiki/RadeonFeature/

(FWIW, I've never had an ATI gfx card under Linux myself).

Ahmad Samir gravatar imageAhmad Samir ( 2014-02-19 05:47:02 -0600 )edit

Thank you Ahmad, but I'm thinking that an answer specific to Fedora quircks would be nice to be available here on ask.fedora. Todo with the specificity ot the desktop, packages, versions, hackery and so on.

antitoxic gravatar imageantitoxic ( 2014-02-19 06:27:51 -0600 )edit
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Ahmad Samir gravatar imageAhmad Samir ( 2014-02-19 06:36:15 -0600 )edit

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answered 2014-02-19 11:33:11 -0600

passthejoe gravatar image

I've been switching between the open Radeon driver and closed Catalyst driver over the course of using Fedora 19 and 20, and I can tell you that before Radeon DPM was enabled (with a bootline switch in the 3.12 kernel and by default in 3.13), there were significant performance and heat differences between the two drivers.

For my AMD A4-4300M APU with AMD Radeon HD 7420G graphics, before Radeon DPM, there was no 3D hardware acceleration, and the CPU ran 30 to 50 degrees hotter than under Catalyst.

Now with the 3.13 Linux kernel, I'm running the open Radeon driver and have CPU temperatures that are comparable to what I had under Catalyst. I also now have 3D acceleration, and performance for what I'm doing is comparable.

I'm sure things are a little better under Catalyst, but they are close enough right now with the open Radeon driver that the convenience of not needing to install Catalyst outside of the Fedora packaging system (there's no package in RPM Fusion any more) outweighs any slight improvements I might get with AMD's closed driver.

Basically, performance improvements for Radeon have been dramatic in the past few months.

However (there's always a 'However'), I was able to get suspend/resume working with Catalyst version 13.11. But with the open Radeon driver I cannot do a successful resume. This is ALMOST a deal-breaker because I really like suspend/resume.

I really do think that running AMD Catalyst outside of Fedora's normal packaging system is more trouble than it's worth, but before I implemented Radeon DPM that trouble was worth it. Now the open driver is good enough that I've been using it for a couple weeks, and it has been a pleasure apart from the suspend/resume issue.

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Attach power meter on your computer plug and then try Open Radeon and then Catalyst driver. I don't know your computer usage but I have it on 24/7. With Open Radeon driver computer consumes much more electricity than with Radeon driver. With Radeon driver computer is also a bit more noisy when cpu needs more cooling and still graphics and actions have delayed movements sometimes.

code78 gravatar imagecode78 ( 2014-04-13 07:54:01 -0600 )edit

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Asked: 2014-02-19 01:58:27 -0600

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Last updated: Feb 19 '14