Editor freeze the computer

Development Platform & Builds
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1

I was running compliled UE4 editor 4.16 fine, until I have to format my disk partitins and restore the system like before, but now the editor not launch, it’s freeze my computer. I’ve not modified nothing on my linux beyond /home partition.
How I see the errors? In console not show anything not normal.

Fedora Linux 26 x64
Kernel 4.11.11
clang 4.0.0
mesa 17.1
CPU: Ryzen 1700
GPU: Radeon 480

2

Getting the same here on version 4.17
Running kernel 4.12.8-2 on Arch clang 4.05 (?)
AMD A10-7850, Radeon 280x
Have compiled both with and without debug to the same effect

3

I fixed this installing Ubuntu 16.04 LTS with proprietary AMDGPUPRO driver. Sad but true.
Seems to have a bug with UE4 and AMD Open source driver now. (before it worked).

4

Switching distro is not really on the cards for me sadly

Am currently compiling 4.16 and will report back

5

Sadly 4.16 crashes on launch, mesa version issue if memory serves

6

Yo two, see my detailed Answer at https://answers.unrealengine.com/questions/699804/system-freezes-when-using-ati-gpu.html?childToView=701614#answer-701614
I’m using UE4.17, Ubuntu 17.04, and if your logs too say it’s related with amdgpu:
I have a R9 280x. If you feel that your problem is related to this case 101325 – UE4Editor crash after pressing "play" with radeon southern island card (7850 HD) just use the preload fix for now.

7

I am indeed on a 280x and will give this a try when I get home tonight, thanks for the response!

8

That worked perfectly, thank you SO much!

Just to have this all in one place

  1. locate either libelf.so or libelf.so.1 - for me (Arch) they are symlinked in usr/lib
  2. Navigate to where you have your UE4Editor built (for me it’s …/UnrealEngine/Binaries/Linux/
  3. Use either: LD_PRELOAD=/usr/lib/libelf.so ./UE4Editor or LD_PRELOAD=/usr/lib/libelf.so.1 ./UE4Editor

Currently compiling shaders :slight_smile:

9

Really glad I could help you!
Strange you are on a 280x too, never seen one of that kind :). I’m hanging out on freenode irc #radeon which is a channel for open source ATI-drivers. Those people pointed out to update mesa to 17.3. That stopped my PC from hanging (required a hard reset before, so now it was almost great) but made my UE4 Editor window really glitch out (the same bug that I had on Linux Mint 18.1 already).
I was also told to create a bug report and upload apitraces and logs, so they could reconstruct the opengl error. But I found those 2 threads already open, while one of them had a soft solution.
I am also writing this, because we need to show more presence - I have experienced “the ue4 struggle” and linux does not make it easier at all. Eventually UE4 on Linux is better after all but thats goes more likely towards mind things.
TLDR; Hopefully until next time. Good Luck out there!

10

Sad to report that while the editor itself launches just fine and is completely working as soon as I hit ‘Play in editor’ it freezes my system again. I can hear sound so something is for sure running
Sorry for the delay in responding but I figured I would do a complete fresh download and compile - takes a while

I wonder if I need to set the preload somwhere else perhaps?

11

I must say that I compiled 4.18.1 with radeon and mesa 17.4 drivers and it still freezes my computer. The graphic card Radeon HD 7870 GHz Edition works on Windows 10 but in Linux I only have to open Editor and wait. Then it freezes with any message on the log.

So how is the best way to know what’s really hanging it?