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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 39 |
1 files changed, 39 insertions, 0 deletions
@@ -1,3 +1,42 @@ +Release 2.20.16 (2012-12-15) +============================ +Rejoice! We have found a trick to make 830gm/845g stable at long last. +Ever since the switch to GEM and dynamic video memory, those early +second generation chipsets have been plagued by instability. The lack of +flushing cachelines from the CPU to GMCH was eventually solved by using +an undocmented bit, but 830/845 were still hanging under memory pressure. +These deaths were all due to garbage finding its way into the command +streamer, and they go away if we take a leaf out of the original driver +and never reuse those pages for anything else. So for the first time +ever, I have been able to complete running the test suite on an 845g, +even whilst thrashing the page and buffer caches! + + * Run the SF stage as single-threaded on gen4 to workaround a few issues + https://bugs.freedesktop.org/show_bug.cgi?id=57410 + + * Keep the scanout SURFACE_STATE separate to avoid overriding its + memory access control on gen6/7 (i.e. writes to the scanout need to + be kept out of the render cache) + + * Tune batch flushing after an operation to an exported surface under a + compositor. + + * Make sure the source is on the CPU for inplace composition of trapezoids + using the CPU + https://bugs.freedesktop.org/show_bug.cgi?id=56825 + + * Immediately flush in the block hander after a split batch to reduce + latency between the two halves of an operation. + https://bugs.freedesktop.org/show_bug.cgi?id=51718 + + * Install a fallback config if we fail to install the desired config + at VT switch (i.e. booting, after resume with 3 incompatible pipes on + Ivybridge) + + * Pin batches to avoid CS incoherence on 830/845 + https://bugs.freedesktop.org/show_bug.cgi?id=26345 + + Release 2.20.15 (2012-12-03) ============================ And lo, enabling more of the common acceleration paths for gen4 revealed |