I reproduce the bug on another computer, using 5.4.0-52-generic kernel: Motherboard: Asrock AM2NF3 VSTA CPU: AMD Phenom II X4 970 (Quad core) RAM: 16GB DDR2 800MHz (4×4 GB) GPU: ATI Radeon HD 4670 AGP VRAM: 1GB DDR3
Of course the same computer works flawlessly with 5.4.0-47-generic kernel. I noticed that if I plug a Radeon 9250 instead of the Radeon HD 4670, the desktop uses LLVMpipe software and GNOME manages to start successfully but this is so slow I can see the desktop being drawn. Note that LLVMpipe rendering on that same GPU but on 5.4.0-47-generic kernel is not that slow. When running 5.4.0-53-generic I can see the pixels being painted, that say so much how slow Ubuntu becomes on kernel greater than 5.4.0-47-generic. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899304 Title: Linux 5.4.0-48 (and later) causes GPU lockup, huge performance drop, makes GNOME desktop fail to start and games going from 70fps to 7fps, slow file loading, audio issues To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1899304/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
