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[Linux] Running Engine with -opengl4 causes crash

 Failed to open BO for returned DRI2 buffer (1110x714, dri2 back buffer, named 21).
 This is likely a bug in the X Server that will lead to a crash soon.
 Signal 11 caught.
 EngineCrashHandler: Signal=11
 [2015.06.29-16.40.10:046][417]LogLinux: === Critical error: ===
 Unhandled Exception: SIGSEGV: invalid attempt to access memory at address 0x00000014
 [2015.06.29-16.40.10:046][417]LogLinux: Fatal error!
 [Callstack]  02  0x00007fb61fc19e01  ReportCrash(FLinuxCrashContext const&)
 [Callstack]  03  0x000000000042f19b  EngineCrashHandler(FGenericCrashContext const&) [/home/ceset/EpicGames/UnrealEngine/Engine/Source/Runtime/Launch/Private/Linux/LaunchLinux.cpp, line 31]
 [Callstack]  04  0x00007fb61fc1d628  PlatformCrashHandler(int, siginfo_t*, void*)
 [Callstack]  05  0x00007fb620695660  /usr/lib/libpthread.so.0(+0x10660) [0x7fb620695660]
 [Callstack]  06  0x00007fb5f27251b9  /usr/lib/xorg/modules/dri/i965_dri.so(+0x3fa1b9) [0x7fb5f27251b9]
 [Callstack]  07  0x00007fb5f23b2d0e  /usr/lib/xorg/modules/dri/i965_dri.so(+0x87d0e) [0x7fb5f23b2d0e]
 [Callstack]  08  0x00007fb5fc3eb5bf  /usr/lib/primus/libGL.so.1(+0x275bf) [0x7fb5fc3eb5bf]
 [Callstack]  09  0x00007fb62068c354  /usr/lib/libpthread.so.0(+0x7354) [0x7fb62068c354]
 [Callstack]  10  0x00007fb614fc3bfd  /usr/lib/libc.so.6(clone+0x6d) [0x7fb614fc3bfd]
 [2015.06.29-16.40.10:046][417]LogExit: Executing StaticShutdownAfterError
 Starting ../../../engine/binaries/linux/crashreportclient
 [2015.06.29-16.40.14:760][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
 [2015.06.29-16.40.14:770][  0]LogExit: Preparing to exit.
 [2015.06.29-16.40.14:771][  0]LogExit: Exiting.
 [2015.06.29-16.40.19:397][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
 [2015.06.29-16.40.19:407][  0]LogExit: Preparing to exit.
 [2015.06.29-16.40.19:408][  0]LogExit: Exiting.
 [2015.06.29-16.40.29:582][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
 [2015.06.29-16.40.29:592][  0]LogExit: Preparing to exit.
 [2015.06.29-16.40.29:594][  0]LogExit: Exiting.
 Aborted (core dumped)

Shaders starts compiling and it crashes after a little while. This happened to me more than once.

Product Version: UE 4.8
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asked Jun 29 '15 at 01:45 PM in Linux

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3 answers: sort voted first

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For the reflection stuff open the console in the editor type what you see in the picture or what is mentioned in the link and hit enter. Or you can make the second one permanent if you edit your Engine/Config/ConsoleVariables.ini and add r.ReflectionEnvironment=0.

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answered Sep 09 '15 at 04:28 AM

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avatar image SalahAdDin Sep 12 '15 at 11:07 PM

yeah, it works, thank you very much man.

But, i think that this bug should be fixed in the next release versions yet.

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What are your drivers/hardware? Also, could you paste the part of the log where GL_VENDOR and such is printed.

This is most likely a problem with Intel drivers though, as indicated by the above message (which is not ours BTW).

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answered Jun 29 '15 at 02:15 PM

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avatar image Corpse0327 Jun 29 '15 at 02:38 PM

Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller]) NVIDIA Corporation GF108M [GeForce GT 540M] [10de:0df4] (rev a1) (prog-if 00 [VGA controller])

Linux *** 4.0.6-1-ARCH #1 SMP PREEMPT Tue Jun 23 14:25:08 CEST 2015 x86_64 GNU/Linux

mesa 10.6.0-1, nvidia 352.21-1, xf86-video-intel 1:2.99.917+364+gb24e758-1, bumblebee 3.2.1-10, primus 20150118-2

By the way i run UE4 by using primus

avatar image Yaakuro Jul 03 '15 at 08:25 AM

Are you using Mesa drivers? What is this:

[Callstack] 06 0x00007fb5f27251b9 /usr/lib/xorg/modules/dri/i965_dri.so(+0x3fa1b9) [0x7fb5f27251b9]

to me it looks like your UE4 is using mesa drivers, i965_dri.so but Mesa doesn't support OpenGL 4.1 at the moment. make sure you use nvidia prop. drivers.

avatar image Corpse0327 Jul 03 '15 at 12:47 PM

With optirun i can't open a project, it crashes. With primusrun i get random crashes out of nowhere in the middle of everything while a project is open. By the way i use propriority drivers v352.xx

I run it wiht primus since it doesn't hurt while opening a project.

avatar image SalahAdDin Sep 17 '15 at 07:41 PM

I'm using the oficial nvidia graphics repository, nvidia-355 drivers, not Mesa drivers.

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I have a similar problem with Ubuntu, but, my problem is that Editor's Viewport showme a black screen, when i do play for reproduce the game, showme all good.

Can anyone help me with this?

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answered Sep 07 '15 at 03:24 PM

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avatar image Corpse0327 Sep 07 '15 at 05:30 PM

Just use opengl 3(which is default) for now. Before Linux Editor becomes officially supported, i doubt it will get any attention

avatar image Yaakuro Sep 08 '15 at 04:45 AM

Read this https://wiki.unrealengine.com/Running_On_Linux#OpenGL_versions. That might solve your problem.

avatar image SalahAdDin Sep 09 '15 at 03:10 AM

Sorry, but, i want to know, how set Anti-Alias level to "Medium"? And how do the second step?

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