On 2016-12-30 13:07, bingmybong@btinternet.com wrote:
Hi
Fell foul of the unable to build nvidia against new 4.9 kernels - something about missing files or sources compiled against wrong versions. So i thought, simple, go back to nouveau, just a matter of removing a blacklist line in a file. Unfortunately not, I get the login (kdm) list, enter my password for the user i selected and then get this message "Plasma is unable to start as it could not correctly use OpenGL 2" - i'm sure my config was set to use opengl 3.x when using nvidia driver. I have to ctrl backspace backspace to return to login list after clearing the popup error message. i've searched the web for this message and did not find any suitable ways of correcting the problem .
Any ideas? I've tried to log in using the plasma failsafe session (?) but that results in getting the same message. I can log in using icewm but thats no good to me and nothing i need runs properly.
Use XFCE instead. Perhaps your issue is this: https://doc.opensuse.org/release-notes/x86_64/openSUSE/Leap/42.2/ 1.5 Nouveau 3D/DRI Driver May Crash KDE Applications Report Bug # With openSUSE Leap 42.2, the Nouveau Mesa/DRI driver for 2D/3D rendering is considered experimental. The Nouveau kernel/KMS driver and the Nouveau X.org/DDX driver for 2D rendering are still considered stable. When the Nouveau Mesa/DRI driver is in use, some applications may crash, especially KDE and Qt applications. The driver is now in a separate package called Mesa-dri-nouveau, which can be removed in case of problems. Without this driver installed, there is no hardware 3D acceleration support on any Nvidia GPU and no 2D acceleration on newer Nvidia GPUs that use Glamor for fast 2D operations. Kernel Mode Setting and basic 2D are still available, as is 2D acceleration via EXA on GPUs from the Nvidia GPU generation code-named Kepler (introduced in 2012) and earlier. 3D operations are supported via software rendering. For more information, see the bug reports at https://bugs.freedesktop.org/show_bug.cgi?id=91632 and https://bugzilla.opensuse.org/show_bug.cgi?id=1005323. -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)