AMD Fusion Falters With Linux 2.6.38 Final
Written by Michael Larabel in AMD on 15 March 2011 at 03:14 PM EDT. 10 Comments
Some may have noticed that hours before Linus released the Linux 2.6.38 kernel, he pulled the latest DRM-fixes code, which included fixes by David Airlie for my Fusion graphics problem last week and another Fusion graphics issue I reported over the weekend. So does Linux 2.6.38 kernel work now with the Fusion Zacate system?

Unfortunately, the open-source graphics driver with Linux 2.6.38 final is still not in good shape. A few open-source games will work like before, but the bugs that hit the Radeon TTM bug persist. However, with the Linux 2.6.38 kernel and the "drm/radeon: fix problem with changing active VRAM size" patch, the system will simply restart right away when running a game like World of Padman.

Here is the bug from last weekend being talked about. Simply using Compiz and some games at least won't cause this memory management issue so you're fine there with very light usage, but otherwise right away when launching the game you will lose your system.

No new patches have been published yet but hopefully the Radeon TTM support is properly fixed in Linux 2.6.39 and that a fix also works its way back into a Linux 2.6.38.x point release. Tomorrow the first AMD Fusion E-350 processing benchmarks should be published on Phoronix.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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