On 08/17/2018 04:52 AM, Frédéric wrote: >> I installed the drivers using the below. Problem is the same, black screen on boot, but you can shift to another terminal and startx. The nVidia control panel shows the driver loaded and reports OK. > I've got exactly the same problem. I'm on F27. I have had a black sddm > screen for 5 weeks (started July 7th 2018) but startx works from a > terminal. > Also on DELL computer but on a Precision 7810 tower. Also with nvidia drivers. > > Here is an error I found in journalctl (full log below): > Aug 11 21:03:25 gamma sddm-greeter[2143]: Failed to create OpenGL > context for format QSurfaceFormat(version 2.0, options > QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, > redBufferSize -1, greenBufferSize -1, blueBufferSize -1, > alphaBufferSize -1, stencilBufferSize 8, sam > > F You might want to take a look at this bug in Ubuntu 18.04 which appears to have been caused by a complex interaction between the display manager and certain kernel changes and possible some problems with getrandom. IN the beginning people though it was just a kernel bug, but people later found that installing a different display manager, installing a daemon to improve the generation of random input and several other workarounds all affected the problem. https://bugs.launchpad.net/bugs/1779827 <https://bugs.launchpad.net/bugs/1779827>
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