On Tue, 18 May 2021 02:18:02 +1000
onefang <onefang_devuan@???> wrote:

> On 2021-05-17 23:31:12, terryc wrote:
> > I am hoping there is a simple config/number change in the grub
> > config files, but I can not find it in the doco I've read.
> >
> > In the past, the list of kernel images just grew each time you
> > loaded/updated the linux-image files. But the current system
> > automatically trims it to just two, with normal and recovery
> > versions of each.
> >
> > The reason I want to do this is to lad step through some of the 5.*
> > kernel to see if any of them now give any support to my AMD RX
> > 5700* XT gpu card that has been unable to be used(unless I want a
> > single screern in vesa mode).
> >
> > LS: At this stage the hardware is correctly identified by various
> > hardware programs with mirrored dual screens during boot up, but the
> > between Xorg, Mesa & Vvulkan, which supposedly make it work, I
> > just get a VESA single screen.
> >
> > My tip is never to but any AMD 5700 card. My 5700 HD never worked
> > reliably under their proprietary driver and it was years before the
> > Radeon driver was able to support it.
>
> I recently bought an AMD Radeon RX 5700 XT card. Your 5700 might be
> too new for Beowulf, I had to jump through some hoops te get my 5600
> working fully. Using the 5.10 kernel from Beowulf-backports, Mesa
> drivers and a bunch of related libraries from a third party PPA, and
> a hack. I now have 3D virtual worlds and dual screen working fine.
> No idea if any of that will work for a 5700, since I don't have one.

The 5700 card has been out for about 18 months and has been
'superceeded' by other cards all ready.

That would be the Ubuntu PPA stuff I'm assuming from all the guides
I've read and must have included a few programs from github. I've
basically followed what I can of those various 'guides' and loaded the
vulkan and mesa stuff available from beowulf-backports, but even
that doesn't make the card work. The mesa in the phoroix article is
later than the beowulf-backports

Nor it seems that apt-get -t beowulf-backports install/reinstall
guarantee the latest. I recently ran the apt-get -t beowulf-backports
update/upgrade and it re-installed a number of the packages I've
installed in the last 24 hours. Head scratch.

I've nailed the problem down to two points.
One is hardware and a 'kernel panic - fatal exception in interrupt' when
dual monitors are plugged in via dpi sockets at powert on. It is okay
to plug the second in afterwards. Otherwise, the 5.10 kernel boots and
loads amdgui drivers.

The second is software and is an Xorg problem when is barks on not
finding /dev/dri/card0 and falls back to VESA mode.

I can live with that for a while and will try lurking in relevant dev
lists to see if there is a future fix or I've got an orphan.

Anyway, thanks.

i


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