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● 04.08.14

●● Phoronix Kernel-oriented News

Posted in News Roundup at 4:58 am by Dr. Roy Schestowitz

Linux

Kernel Developers Look At QR Codes For Error MessagesF2FS File-System Gains Large Directory Support, More Tuning

Linux 3.15

New Media/V4L2 Drivers For Linux 3.15ARM SoC Changes Merged For Linux 3.15 KernelFeatures That Landed So Far For The Linux 3.15 KernelFor those not keeping up to date on all of the Phoronix articles covering the Linux 3.15 kernel changes that landed in the past week, here’s a recap of the changes that were merged so far half-way through the Linux 3.15 merge window.

Graphics Stack

The Humongous DRM Graphics Pull For Linux 3.15 Was SubmittedThe very large DRM pull request for the Linux 3.15 kernel was submitted just moments ago with significant updates to the open-source Linux graphics drivers. Mesa 10.2 Planned For Late May / Early June ReleaseWeston Gains Support For Using The New XWayland DDXWayland’s reference compositor Weston now has support for using the new XWayland DDX support that was merged into the X.Org Server. Samsung Sends Out Their Updated Exynos DRM DriverUsers of the Samsung Exynos DRM driver will see several updates appear with the Linux 3.15 kernel.Users of the Samsung Exynos DRM for display support with Samsung’s recent ARM SoCs can find the addition of a MIPI-DSI driver, S6E8AA0 MIPI-DSI-based panel drivers with accompanying DeviceTree bindings, a LD9040 parallel-panel driver, super device support, and other fixes.

NVIDIA

NVIDIA Fermi/Kepler GPUs Are The Best Bet For Ubuntu 14.04 NouveauIn my testing of Ubuntu 14.04 LTS with the Linux 3.13 kernel and Mesa 10.1 for the open-source graphics driver stack provided by Nouveau for NVIDIA GeForce graphics hardware, only the Fermi and Kepler GPUs are running reliably. While these newer NVIDIA GPUs are running stable with Ubuntu 14.04, the performance is still a wreck due to lack of reclocking.Nouveau Picks Up Slightly Better OpenGL 4.0 SupportNouveau Becomes Friendly Towards Non-Root X ServerThe xf86-video-nouveau driver as of today supports server-managed file descriptors. As explained in the earlier Phoronix article, Last month we wrote about Red Hat working on a suid root wrapper for the X.org Server and other improvements being led by Red Hat’s Hans de Goede to run Xorg in more configurations without needing root support. As part of this, sever managed file descriptors (FDs) has been one of the changes needed by the X.Org graphics drivers for supporting this change of running the xorg-server without root rights. Besides needing changes to the DDX drivers and the X.Org Server (those changes are landing with X.Org Server 1.16 this summer), systemd-logind is also needed.

Benchmarks

20-Way Intel/AMD/NVIDIA GPU Comparison With Ubuntu 14.04 LTS

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