Cycles viewport GPGPU render (two cards) generating split viewport result #37134

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David Black · 2013-10-18T01:32:10+02:00

David Black commented

2013-10-18 01:32:10 +02:00

%%%--- Operating System, Graphics card ---
Windows 7 x64
(Display) HD4000
(GPGPU) 2 GTX 580 3GB

- Blender version with error, and version that worked ---

Tested many versions, from r60000 (including 2.69 RC1 + RC2) through to latest BuildBot r60807

Last working version I have, official 2.68a r58537

Sorry unable to identify specific version number where bug began, do not have builds between r58538 and r60000 to test.

- Short description of error ---

Cycles viewport GPGPU render (using two graphics cards) generates horizontal split viewport (see images), lower half of viewport render replicated above.

Tested with different scenes (always same result), also with and without saved config, to help rule out user error and program settings changes.

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Download 2.69 RC2, start Blender, open user prefs, select CUDA and multiple GPU's, close prefs, select render type Cycles Render, in render tab make sure GPU is selected, begin viewport render (press Shift z).

Selecting a single graphics card, viewport renders correctly, bug only happens selecting (in my case) two cards for GPGPU.

David%%%

%%%--- Operating System, Graphics card --- Windows 7 x64 (Display) HD4000 (GPGPU) 2 GTX 580 3GB - Blender version with error, and version that worked --- Tested many versions, from r60000 (including 2.69 RC1 + RC2) through to latest BuildBot r60807 Last working version I have, official 2.68a r58537 Sorry unable to identify specific version number where bug began, do not have builds between r58538 and r60000 to test. - Short description of error --- Cycles viewport GPGPU render (using two graphics cards) generates horizontal split viewport (see images), lower half of viewport render replicated above. Tested with different scenes (always same result), also with and without saved config, to help rule out user error and program settings changes. - Steps for others to reproduce the error (preferably based on attached .blend file) --- Download 2.69 RC2, start Blender, open user prefs, select CUDA and multiple GPU's, close prefs, select render type Cycles Render, in render tab make sure GPU is selected, begin viewport render (press Shift z). Selecting a single graphics card, viewport renders correctly, bug only happens selecting (in my case) two cards for GPGPU. David%%%

David Black commented

2013-10-18 01:32:10 +02:00

Changed status to: 'Open'

David Black commented

2013-10-18 08:58:41 +02:00

%%%Managed to find older version to test, r59920M also presents mentioned viewport render bug.

Seems bug was introduced between r58538 - r59920

Sorry been unable to try versions after 2.68a sooner. Hope this is helpful in reducing commit log searchers.

David%%%

%%%Managed to find older version to test, r59920M also presents mentioned viewport render bug. Seems bug was introduced between r58538 - r59920 Sorry been unable to try versions after 2.68a sooner. Hope this is helpful in reducing commit log searchers. David%%%

Brecht Van Lommel commented

2013-10-18 22:12:41 +02:00

%%%Fix in svn revision 60848, thanks for the report. The revision numbers were indeed helpful in finding the problem, thanks :)

There should be a build with the fix here soon:
http://builder.blender.org/download/%%%

%%%Fix in svn revision 60848, thanks for the report. The revision numbers were indeed helpful in finding the problem, thanks :) There should be a build with the fix here soon: http://builder.blender.org/download/%%%

Brecht Van Lommel commented

2013-10-18 22:12:41 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2013-10-18 22:12:41 +02:00

David Black commented

2013-10-19 09:43:24 +02:00

%%%Thank you kindly for your rapid fix and for forcing a BuildBot build to test. After testing can confirm bug fixed. :)

David%%%

%%%Thank you kindly for your rapid fix and for forcing a BuildBot build to test. After testing can confirm bug fixed. :) David%%%

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Cycles viewport GPGPU render (two cards) generating split viewport result #37134