Canonical has made a Actual-time version of Ubuntu 22.04 obtainable on x86 and Arm… however solely to Ubuntu Professional clients, and there are some potential points you must learn about.
The brand new real-time version was announced on Valentine’s Day [insert joke about loving a more responsive computer here]. The beta model appeared final 12 months, a few months after the launch of twenty-two.04 “Jammy Jellyfish” that April. The distinction from customary Ubuntu is that this model integrates the out-of-tree PREEMPT_RT patches into kernel 5.15.
Canonical will shortly maintain an internet seminar to clarify the brand new product.
This re-creation follows Intel’s acquisition of the real-time kernel developers Linutronix in February final 12 months. This resulted in new funding into the pre-emptible kernel mission, whose first patches went into kernel 2.5.4 in 2009. Now larger outcomes are showing, they usually’re not restricted to Intel processors and even to x86: there’s additionally an Aarch64 model of Actual-time Ubuntu. For now, the PREEMPT_RT patches are not a part of the mainline kernel, though Intel is working to get them included quickly – so Ubuntu is pushing the know-how curve somewhat right here.
In a technique, the timing is somewhat unlucky for Canonical: the second replace to Jammy, model 22.04.2, is expected subsequent week, and that can have kernel 5.19 from Ubuntu 22.10. Because of this in the event you go for Actual-time Ubuntu, your techniques might be held again to the older kernel model. That is not an enormous drawback, although: as we coated when it was launched, kernel 5.15 is a LTS release and its projected end-of-life date is not till October.
For now, the totally different kernel is the principle distinction. This is not a brand new taste or remix or something: it is the identical Ubuntu (Desktop, Server, or Core) however with a unique kernel constructed with the RT patches. All you want is an Ubuntu Professional subscription, which, as we have coated, has been free for single users with up to five machines since final October.
Simply the kernel will not make your machine all of the sudden real-time. The corporate instructed us:
Our first thought was that in the event you’re not constructing 5G base stations or one thing, an apparent use of this may be Ubuntu Studio, the particular version for creatives which incorporates music composition and sequencing instruments. Ubuntu Studio makes use of the present low-latency kernel, and because it occurs, in 2020 the Ubuntu Studio mission truly warns towards RT kernels:
You may additionally see points in the event you want proprietary drivers that want kernel modules – there are identified issues with the Nvidia binary graphics drivers, as an illustration.
Whereas that is good to see, and regardless of the lengthy historical past of the event of the real-time kernel, we might recommend holding again for now, until you may have an pressing want for real-time assist – and protecting Actual-time Ubuntu away from general-purpose desktops and servers. ®
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