SUMMARY After the upgrade to last kernel (6.8.0-47 generic) after the boot, and instead of login screen, you get a black screen STEPS TO REPRODUCE 1. Boot from the last kernel (6.8.0-47 generic) 2. You get nothing but a black screen OBSERVED RESULT No login screen, but a black one EXPECTED RESULT A login screen, and the possibility to login SOFTWARE/OS VERSIONS Operating System: KDE neon 6.2 KDE Plasma Version: 6.2.1 KDE Frameworks Version: 6.7.0 Qt Version: 6.7.2 Kernel Version: 6.8.0-47-generic (64-bit) Graphics Platform: X11 Processors: 4 × AMD Ryzen 3 3200G with Radeon Vega Graphics Memory: 5,2 GiB of RAM Graphics Processor: AMD Radeon Vega 8 Graphics ADDITIONAL INFORMATION If I boot in recovery mode (with the same kernel) I can login and, after, all seems ok
even with the last (1 hour ago) updates still black screen, unless i go to the recovery mode...
and also in another device, with KDE Neon and that kernel...
In this other device the black screen bug is really severe: Operating System: KDE neon 6.2 KDE Plasma Version: 6.2.2 KDE Frameworks Version: 6.7.0 Qt Version: 6.7.2 Kernel Version: 6.8.0-45-generic (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 5700G with Radeon Graphics Memory: 13.5 GiB of RAM Graphics Processor: AMD Radeon Graphics Manufacturer: Gigabyte Technology Co., Ltd. Product Name: A520M K V2 System Version: -CF I don't know if it is relevant, but this other device has an hdmi monitor.
In this last device I solved (workaround) modifying the grub file in /etc/default. in this way: #GRUB_CMDLINE_LINUX_DEFAULT="quiet splash consoleblank=240" GRUB_CMDLINE_LINUX_DEFAULT="quiet"
closing as fixed as reported