#790690 linux-image-3.16.0-4-powerpc64: powerpc64 & 64Kb kernel pagesize not working with nouveau

Package:
src:xserver-xorg-video-nouveau
Source:
xserver-xorg-video-nouveau
Submitter:
Peter Saisanas
Date:
2021-10-07 08:33:02 UTC
Severity:
important
Tags:
#790690#5
Date:
2015-06-30 21:10:55 UTC
From:
To:
Dear Maintainer,

The recent Debian kernels for powerpc64 are configured with a 64Kb kernel
pagesize.
This works slightly better in terms of performance, however the nouveau display
driver does not currently work kernel pagesizes other than 4Kb size when
running XOrg and powerpc64. It works ok if only using the console though.

Technically, this is a bug of nouveau, but in the interests of improving the
out of box experience for people installing debian jessie on powerpc64 platform
desktop machines such as the Powermac G5,
could the kernel please be configured and built with the 4Kb kernel pagesize
option instead of 64Kb as a workaround, or provide an option to install a 4Kb
kernel pagesize kernel for machines like the powermac G5 commonly used with
nVidia nv40 class GPU's to get XOrg working with as minimum of fuss.

Currently, users must recompile the kernel unfortunately and configure with 4Kb
kernel pagesize as this is what nouveau will only work with for now.
This is a hindrance to making people want to adopt debian as their preffered
linux distro with powerpc64 G5 powermac machines.

Im currently running vanilla 3.18.16 configured with 4Kb and nouveau can be
made to work without too many dramas.

Regards,
Peter
#790690#8
Date:
2016-03-30 08:52:07 UTC
From:
To:
Dear OP,

Is the bug report still accurate with regards to latest src:linux ?

thx
#790690#13
Date:
2016-03-30 09:25:05 UTC
From:
To:
Control: affects -1 xserver-xorg-video-nouveau
Control: tags -1 confirmed upstream

Which kernel version are you using ?
#790690#24
Date:
2016-03-30 14:17:01 UTC
From:
To:
2016-03-30 12:25 UTC+03.00, Mathieu Malaterre <malat@debian.org>:
Originally 3.16.0-4-powerpc64 (Jessie)
Now 4.4.0-rc7-powerpc64 (Peter)

Risto
#790690#29
Date:
2016-03-30 14:22:00 UTC
From:
To:
Control: notfound -1 3.16.0-4
Control: found -1 4.4.6-1

Thanks
#790690#36
Date:
2016-03-30 14:49:38 UTC
From:
To:
I meant to say that the bug is in version 3.16.0-4 (64k page) and not
in 4.4.0-rc7 (4k page).

Risto
#790690#41
Date:
2016-03-30 14:51:11 UTC
From:
To:
Control: found -1 3.16.0-4

My bad. Thanks for the quick catch.
#790690#48
Date:
2016-03-30 19:49:09 UTC
From:
To:
[...]

That is not a version number we've ever used.

Ben.
#790690#53
Date:
2016-03-31 05:34:33 UTC
From:
To:
The corresponding source package number is 3.16.7-ckt20-1+deb8u4.

Risto
#790690#58
Date:
2016-03-31 06:02:43 UTC
From:
To:
#790690#65
Date:
2016-04-07 05:56:01 UTC
From:
To:
FYI



Comment # 6 on bug 94757 from Ben Skeggs

I have a WIP chunk of work which will hopefully address this issue as a
side-effect.  It's not ready for general consumption yet, but I'll update the
bug once it is.
#790690#70
Date:
2016-04-07 08:10:03 UTC
From:
To:
Since nouveau people are currently considering that not supporting 64K
page is a bug. It is time to re-affect the bug to nouveau instead of
src:linux.