[Bug 2161229] Re: Subject: Kernel regression: Black screen (display power off) with series 7.0.0 on HP ProDesk 600 G2 MT (AMD Radeon R7)

Solved. you need to modify grub by replacing the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash " with GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.si_support=0 radeon.si_support=1" in /etc/default/grub update grub with sudo update- grub and reboot, in order to disable amdgpu, which, the new version installed by linux 7.0.0, creates the compatibility issue, and enable redeon -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2161229 Title: Subject: Kernel regression: Black screen (display power off) with series 7.0.0 on HP ProDesk 600 G2 MT (AMD Radeon R7) Status in linux package in Ubuntu: New Bug description: Since upgrading to kernel 7.0.0, the system fails to initialize the graphical environment during boot. After the splash screen, the monitor loses signal/powers off. The system appears to be running (as I can reach the terminal via TTY), but Xorg/Wayland fails to display. Hardware Details: Computer: HP ProDesk 600 G2 MT CPU: Intel Core i7-6700 GPU: AMD Radeon R7 250 / HD 8830M OS: Linux Mint 22 Cinnamon Steps to Reproduce: Boot with kernel 7.0.0-28. System reaches the login screen/splash screen. Screen turns black/monitor reports "no signal". Expected Behavior: The system should initialize the display correctly, as it does with kernel 6.17.0-40. Additional Information: lspci shows: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde PRO / Venus LE / Tropo PRO-L [Radeon HD 8830M / R7 250 / R7 M465X] (rev 87) The issue is resolved by reverting to kernel 6.17.0-40. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161229/+subscriptions