13 Years After Launch, The Open-Source Radeon Linux Driver Sees Occasional ATI R5xx Fix
Written by Michael Larabel in Radeon on 10 May 2019 at 06:28 AM EDT. 20 Comments
RADEON --
It's not too often these days that new kernel updates bring changes to the pre-GCN Radeon Linux driver, but overnight a fix has been queued for helping out at least some users still running with ATI R5xx series hardware.

R500 is what was the Radeon X1000 series more than a decade ago. On the Microsoft side, Windows 7 was the end of the road for the Radeon X1000 series hardware while under Linux the open-source driver code continues to see rare commits. This latest bit of work for R500 is a PLL fix to fix flickering in some cases.

The change now has the legacy Radeon driver preferring lower reference dividers rather than the closest divider. At least for the user who reported a flicker bug last year, this patch resolves those screen flickers.


With R500 hardware rarely seeing use these days, the bug was actually around for a few years but at least now is resolved. This PLL fix was sent in to DRM-Next along with fixes for more recent issues around ATPX, SR-IOV, and a crash fix for the in-development Linux 5.2 kernel.
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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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