(SOLVED) Lost Hardware Acceleration After Updates

Screen resolution, 3D Acceleration, nVidia, ATI
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crl0901
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(SOLVED) Lost Hardware Acceleration After Updates

Post by crl0901 » Thu Sep 05, 2019 6:29 pm

Info:
Linux Mint 19.2
Cinnamon 4.2.4
Kernel 4.15.0-60
Nvidia GTX950
Dual-monitors

I installed Mint about a month ago and had everything working fine. Was using the 430 Nvidia driver, had both monitors working properly. Patched a couple days ago and I can't seem to get the system to use hardware drivers again. I get the message "your system is currently running without video hardware acceleration". If I open driver manager, it says 1 proprietary driver is in use and it's has the 430 driver selected. I tried booting from an older kernel version but that didn't solve anything.

Some more info:

Code: Select all

user@office-pc:~$ inxi -b
System:    Host: office-pc Kernel: 4.15.0-60-generic x86_64 bits: 64 Desktop: Cinnamon 4.2.4 Distro: Linux Mint 19.2 Tina 
Machine:   Type: Desktop Mobo: ASRock model: B85M-ITX serial: <root required> BIOS: American Megatrends v: P2.40 
           date: 07/27/2015 
CPU:       Dual Core: Intel Pentium G3258 type: MCP speed: 800 MHz min/max: 800/3200 MHz 
Graphics:  Device-1: NVIDIA GM206 [GeForce GTX 950] driver: nvidia v: 430.26 
           Display: x11 server: X.Org 1.19.6 driver: fbdev,modesetting,nouveau unloaded: vesa resolution: 1600x900~77Hz 
           OpenGL: renderer: llvmpipe (LLVM 8.0 128 bits) v: 3.3 Mesa 19.0.8 
Network:   Device-1: Qualcomm Atheros QCA8171 Gigabit Ethernet driver: alx 
Drives:    Local Storage: total: 1.14 TiB used: 111.67 GiB (9.6%) 
Info:      Processes: 206 Uptime: 7m Memory: 7.71 GiB used: 1.86 GiB (24.1%) Shell: bash inxi: 3.0.32 

That output shows the nvidia driver, but Nvidia Settings doesn't show any monitors or other settings, and I can't get the second monitor detected in Displays. So something is off here but I'm not sure what.
Last edited by crl0901 on Fri Sep 06, 2019 5:40 pm, edited 1 time in total.

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karlchen
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Re: Lost Hardware Acceleration After Updates

Post by karlchen » Thu Sep 05, 2019 7:06 pm

Hello, crl0901.

The symptoms, why Cinnamon drops back to software rendering mode, can be seen in your inxi -b report, section "Graphics".

Code: Select all

Graphics:  Device-1: NVIDIA GM206 [GeForce GTX 950] driver: nvidia v: 430.26 
           Display: x11 server: X.Org 1.19.6 driver: fbdev,modesetting,nouveau unloaded: vesa resolution: 1600x900~77Hz 
           OpenGL: renderer: llvmpipe (LLVM 8.0 128 bits) v: 3.3 Mesa 19.0.8 
Your system should load only the nvidia driver. But for some reason it loads 3 drivers: fbdev, modesetting and nouveau.
3 drivers are 2 too many (fbdev, modesetting) and the 3rd one is the wrong one: nouveau instead of nvidia.

As a consequence, the fbdev driver prevents hardware acceleration from working, and some absolutely inappropriate OpenGL renderer llvmpipe gets loaded.

I assume that the solution will be uninstalling all proprietary nvidia 430.26 driver modules first, thus dropping back to the open source driver nouveau.
Once only nouveau is in use, you may very likely re-install nvidia 430.26 or newer.

HTH,
Karl
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crl0901
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Re: Lost Hardware Acceleration After Updates

Post by crl0901 » Fri Sep 06, 2019 5:40 pm

Thanks. I uninstalled fbdev driver with "sudo apt-get remove xserver-xorg-video-fbdev", rebooted, and now my nVidia drivers are working properly.

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