Segmentation fault, mostly when saving (ubuntu)

[segfaultack]

Hello,

Been having trouble with segmentation faults. All the info is here: https://old.reddit.com/r/OpenMW/comment ... ge_ubuntu/

Thought it had something to do with loading music files but that doesn't seem to be the case. It mostly happens when saving (especially quick saving) but also sometimes happens when loading new cells.

In one of the first crashes it gave a memory address for the segmentation fault. It normally says (nil) though.

Anyone know what the deal is?

[psi29a]

If you are installing from Ubuntu, it's possible that you are running against a known issue where the Ubuntu packages an old buggy version of OSG (3.6.4) which causes crashes.

Can you verify which version of OSG you have installed?

The work around is to use our PPA where we make all the packages necessary to install and run openmw.

https://launchpad.net/~openmw/+archive/ubuntu/openmw

The instructions are there.

[segfaultack]

Uninstalled OpenMW and reinstalled from the official repo. Definitely a different version than the one I installed through apt.

If you are installing from Ubuntu, it's possible that you are running against a known issue where the Ubuntu packages an old buggy version of OSG (3.6.4) which causes crashes.

Can you verify which version of OSG you have installed?

Running dpkg -S openscenegraph returns this:

Code: Select all

openscenegraph: /usr/share/doc/openscenegraph
openscenegraph: /usr/share/doc/openscenegraph/copyright
openscenegraph: /usr/share/doc/openscenegraph/changelog.Debian.gz
libopenscenegraph161:amd64: /usr/share/doc/libopenscenegraph161/changelog.Debian.gz
libopenscenegraph161:amd64: /usr/share/doc/libopenscenegraph161/copyright
libopenscenegraph161:amd64: /usr/share/lintian/overrides/libopenscenegraph161
libopenscenegraph161:amd64: /usr/share/doc/libopenscenegraph161

The first three entries are from me installing openscenegraph independently and probably aren't affecting anything. Still crashes.
I imagine based on the name of the last 4 entries that the version is 1.61.

HOWEVER, the crashes have changed with the new version. The crashes now consistently give a memory address and they also happen more often. I've attached the terminal outputs and crash logs for two of the crashes.

EDIT: I've also had two signal 6 fatal errors and another just now. Terminal output and crash log attached.

[LoneWolf]

161 is the internal version number used by upstream released osg 3.6.5 .

The openmw osg fork also reports as osg 3.6.5 in openmw.log , but uses 162 as internal version,
osg 3.6.4 used 160 .

[segfaultack]

I think I have it figured out now since I haven't crashed in a while. First issue was due to the OpenSceneGraph bug. Subsequent crashes after installing from the official repo were due to not having enough memory. Made certain my swap partition was functioning and reduced all graphics settings. Game is now stable. However, upgrading to the official repo has caused some performance issues (used to just be low fps, now it's low fps and something like rubber banding). Anyone know how to make OpenMW more playable on integrated graphics? CPU is an i5-4300 for reference. 8GB RAM, likely DDR3 based on the age of this lemon.

EDIT: Riiiip, so I updated my BIOS to the latest version (A28, Dell 7139) and now I get /openmw: symbol lookup error: ./openmw: undefined symbol: _ZNK3osg6Camera25computeLocalToWorldMatrixERNS_7MatrixdEPNS_11NodeVisitorE when I press Play on the launcher.

EDIT: Fixed the above error by OpenMW manually. Still poor performance though. EDIT: In fact, it's worse now. Keep getting flashes of things in the environment.