touch-packages team mailing list archive

[Emil-l-velikov <1275042@xxxxxxxxxxxxxxxxxx>]

(In reply to joro-2013 from comment #16)
> Allow me to add my experiences.
> 
> Whether the colors are garbled on PPC depends on the GL color format used
> (among probably a gazillion other parameters :-). Packed (16-bit) formats
> have been broken on big-endian for some time, they worked fine in mesa 10.1,
> in mesa 10.3 R5G5B5A1 works, R4G4B4A4 works with alpha glitches, somewhere
> in the 10.3 release cycle the format stuff got completely rewritten breaking
> pretty much all packed formats on big-endian (PPC).
> 
> Unpacked (32 bits) formats seem to be working fine.
> 
> That's on a RV280 32 bit system. No idea whether that is also valid for NV34
> on 64-bit PPC, i.e. whether the problem is in core mesa or the radeon stuff.

The report in question is (was?) about the gallium radeon driver -
r600g.

On the classic radeon/r200 front there was a regression caused by commit
779cabfc7d022de8b7b9bc7fdac0caffa8646c51 (which itself fixing some BE
issues, circa 11.0), which was resolved in 11.0.6 and 11.1.0. If things
are still off, then I'd suggest opening separate bug report and if
possible bisecting it down.

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https://bugs.launchpad.net/bugs/1275042

Title:
  Wrong colors with Mesa 9.2 and Mesa 10.0 on Lubuntu 14.04 PowerPC

Status in Mesa:
  Confirmed
Status in mesa package in Ubuntu:
  Confirmed

Bug description:
  Hi all,

  I've tried Mesa 9.2.2-1 and 10.0.1 on Debian Sid, Lubuntu 13.10, and
  on Lubuntu 14.04. Unfortunately all have issued false colors in games.
  They appear to be ABGR instead of RGBA, thus blue becomes green, red
  becomes alpha etc.

  Mesa 8.0.5-4 and Mesa 9.1.6 have no color problem.

  The transitional solution is to install the old Mesa 8.0.X with "Force
  Version" with the Synaptic package manager on new distributions.

  We had a problem with wrong colors in SuperTuxKart 0.8 last year. The
  Irrlicht guys have released a little hack for Irrlicht on Linux PPC
  (http://irrlicht.sourceforge.net/forum/viewtopic.php?f=7&t=48577).
  They told me that is a driver bug, and that workaround costs
  performance and RAM. Unfortunately this workaround isn't suitable for
  Mesa 9.2 and higher. At this time we have to install Mesa 9.1.X and
  lower on new Linux distributions like Lubuntu 13.10, Lubuntu 14.04,
  Debian Sid etc. It would be nice to solve this issue because we don't
  need the workaround in the future.

  Hardware:

  AmigaOne X1000 (Nemo)
  PA Semi Dual-core PA6T-1682M, 1.8GHz PowerISA™ v2.04+ CPU
  "Xena" 500MHz XMOS XS1-L2 124
  8GB DDR2 SDRAM
  HIS Radeon HD 6870, 1 GB RAM
  OCZ600MXSP 600 Switching power supply
  RTL 8139/8139C/8139C+ network card
  TSSTcorp CDDVDW SH-224BB dvd drive
  ATA ST2000DM001-9YN1 SEAGATE HD
  ATA ESA 3SF1240GB HD

  More information:

  http://en.wikipedia.org/wiki/AmigaOne_X1000
  http://www.supertuxkart-amiga.de/amiga/x1000.html

  Rgds,
  Christian

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