Bug#721835: foobillardplus: Bogus rendering

[Markus Koschany]

Control: tags -1 confirmed

On 04.09.2013 15:29, Guillem Jover wrote:
> Package: foobillardplus
> Version: 3.43~svn168+dfsg-1
> Severity: normal
> 
> Hi!
> 
> This game is missrendering on my system. Attached is a screenshot, but
> that does not show the "animation" with triangles coming and going.
> 
> I've tried disabling anything on the settings that might affect the
> rendering but to no avail. I've also noticed that the program outputs
> errors related to the object tessellation which I think might be relevant
> here. My suspicion is that my hw (Intel GM45 / i915) does not provide
> one of the OpenGL extensions and the software fallback code is buggy.
> Here's the game output:
> 

Hi Guillem,

thanks for your report. I can confirm your issue because I can reproduce
it on my Lenovo X200 laptop with an Mobile Intel GM45 Express Chipset too.

However the game works fine on my computer with a Geforce 9600 GT
(nouveau drivers) and another one with an AMD HD 6450 video card (radeon
drivers).

The author of foobillardplus is aware of the problem. He has already
mentioned it in his README file. Unfortunately I installed the file into
the wrong package (foobillard), so it was easy to miss. I'm aware of
this mishap and I will install the README to foobillardplus with the
next revision.

The Tessellation errors don't seem to be related because they also
appear here on my computer where foobillardplus works flawlessly. This
might be a different problem but at the moment I consider this output
simply as noise.

I have the same suspicion as you that the Intel GM45 chipset is not
capable of rendering all graphics because of missing OpenGL extensions.
I'm not sure yet whether this is a sole hardware problem or a driver issue.

Though Foobillardplus requires 100% OpenGL compatible graphic card
drivers. I'm inclined to clone this bug report and to reassign the clone
to xserver-xorg-video-intel. If the maintainers of the intel driver
confirm that this is rather a hardware issue than a driver issue, then
this bug should be marked as "wontfix". If it is a driver issue, then I
intend to keep this bug report open until a open source driver is
developed that fixes the issue.

I'm not so sure about the "software fallback code". In most
circumstances this means that users experience a very sluggish game and
in my opinion this isn't a real fix.

So in short: I believe this is an issue related to your video card and
it won't/can't be really fixed by the author of foobillardplus.

Regards,

Markus


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 966 bytes
Desc: OpenPGP digital signature
URL: <http://lists.alioth.debian.org/pipermail/pkg-games-devel/attachments/20130904/eac74c54/attachment.sig>