On Sun, 28 Dec 2014, Gene Heskett wrote:
On Sunday 28 December 2014 09:24:29 Raphaël Mouneyres did opine
And Gene did reply:
Le 26 déc. 2014 à 09:26, David Christensen <dpchrist@xxxxxxxxxxxxxxxx> a
écrit :
> 1. Some chips (Atom?) have proprietary graphics without Linux
> support.
I have two Intel D525MW Atom based boards running Archlinux, video
driver is working perfectly out of the box. I use those board to do
realtime audio using linux sampler and RME PCI audiocard, it does an
excellent job.
I can duplicate that story with 2 of them, running the 10.04.4 LTS Ubuntu
linux server edition, with a special rtai patched realtime kernel, running
a lathe and a milling machine. Some folks would call that dangerous
machinery. But the on board i915 video works flawlessly, and quite a bit
faster than VESA. These are machines that would get retired or the job
offloaded to a $90 specialty card if the IRQ latency ever went above 5
microseconds. More usual measurement is 2 microseconds. For this bit of
critical usage, all one can say about them is that they Just Work(TM).
Certainly the video "works" OOTB with these boards. there is nothing that
just doesn't display or anything like that. It is just that linux (and
newer windows) doesn't use the full ability of the GPU. This, in some
applications, makes the whole board look slower than it acually is because
the CPU has to take over the GPU's job for some things. There are many
applications where the graphics are not that critical such as running
Ardour and friends that do not show any problem with the video at all. On
mine the memory is limited to 4G and the netbook is 2G which might in some
cases be a problem (I find 1G too small and 2G ok). The word "desktop" to
me means running more than just audio apps and the GPU/drivers seem to
fail in that context (that is use too much CPU for smooth, up to speed video).
There was one or two kernels that did have a full driver (from Intel) and
10.04 may have been when (sounds about right to me). So using a
distro/kernel of that age may work better. My comments are based on 14.04.
However, I will agree that these are a very good low latency/RT machine.
Even running Kubuntu with the lowlatency kernel allows me no xruns as low
as the audio IF will work. The video might be slow, but the audio just
works.
--
Len Ovens
www.ovenwerks.net
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