Linux: PulseAudio, AMD, and Intel

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PulseAudio 15 Lands mSBC Codec Support To Enable Bluetooth Wideband Speech
While PipeWire is being increasingly looked at by desktop Linux distributions as the future of audio/video stream handling on the Linux desktop, aside from Fedora most Linux distributions are so far being cautious in replacing PulseAudio. In any event, PulseAudio is showing no signs of letting up and continues seeing new feature development.
The latest work to land on Monday for the PulseAudio sound server was mSBC codec support for its Bluetooth native headset backend. This mSBC codec support in turn allows for wideband speech to be supported for capable Bluetooth headsets interfacing with the Linux desktop by way of PulseAudio.
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AMD Sends Out Linux Kernel Patches To Allow Disabling Predictive Store Forwarding (PSF) - Phoronix
AMD last week published a security whitepaper on Zen 3's Predictive Store Forwarding (PSF) functionality introduced with Ryzen 5000 series and EPYC 7003 series processors. In the whitepaper they mentioned Linux patches were published for allowing this feature to be disabled if concerned about the security risk, well, today those patches were made public.
Hitting the Linux kernel mailing list today were the five patches for mitigating Predictive Store Forwarding if desired. With a patched kernel, PSF remains on by default but can be disabled via the Spectre V4 mitigation control or by setting the nopsfd kernel parameter boot option to just force off this feature. Again, this is only relevant for Zen 3 (and presumably future) CPUs.
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Linux 5.13 - Another Step In Prepping Intel Discrete Graphics, Preferring Local Memory - Phoronix
Over the past two years we have seen a lot of Intel Linux kernel graphics driver work in preparing to support Intel discrete graphics cards. That work is still ongoing even for the DG1 graphics card that has been sampling to customers while Linux 5.13 will take things another step forward this summer.
Much of Intel's discrete GPU bring-up for Linux has been restructuring of their i915 kernel driver to handle device-local memory. Up to now with their exclusively integrated graphics focus their video memory handling has been much simpler and made assumptions about always using system RAM. But now with discrete GPUs and having dedicated video memory, over the past two years has been a lot of video memory code changes to their driver as part of their bring-up for DG1 and future discrete graphics processors.
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