[Bug 2161093] Re: Black screen after boot with kernel 7.0.0-28-generic on AMD Radeon RX 580

Additional information: Since my previous update, the black screen now occurs after every package update that requires a reboot. The pattern is always the same: install package updates; reboot; black screen during boot; perform a hard reboot; the system then boots normally and continues to work normally until the next package update. I also tested the previous workaround using the kernel parameter amdgpu.dc=0. On previous kernels, this parameter allowed the system to boot normally. However, with kernel 7.0.0-28-generic, adding amdgpu.dc=0 now results in a permanent black screen during boot. In other words, the workaround that previously avoided the issue no longer works on the latest kernel. -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2161093 Title: Black screen after boot with kernel 7.0.0-28-generic on AMD Radeon RX 580 Status in linux package in Ubuntu: Confirmed Bug description: After installing the latest system updates on KDE neon, my system no longer boots into the graphical desktop when using kernel 7.0.0-28-generic. Hardware: - CPU: AMD Ryzen 5 1600 - GPU: AMD Radeon RX 580 8 GB (Polaris) Symptoms: - GRUB loads normally. - The boot logo is displayed. - After that the screen becomes completely black. - Ctrl+Alt+F1...F6 do not switch to a TTY. - Ctrl+Alt+Del reboots the computer. Booting the previous kernel (6.17.0-40-generic) on the same installation works normally. The issue started immediately after installing system updates. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161093/+subscriptions