http://bugzilla.opensuse.org/show_bug.cgi?id=1194384 Bug ID: 1194384 Summary: [simpledrm][UEFI] Black screen until KMS engages, then system freezes, when KMS is defective and plymouth=0 Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: x86-64 OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: mrmazda@earthlink.net QA Contact: qa-bugs@suse.de CC: tiwai@suse.com, tzimmermann@suse.com Blocks: 1193250, 1193640 Found By: --- Blocker: --- Original Summary: [simpledrm][UEFI] Black screen until KMS engages, then system freezes, when KMS is defective and plymouth=0 Background: Asus has been a nightmare of asking for more info because my Rocket Lake motherboard will not boot any Linux OS unless the displays connected to the motherboard's 3 graphics connectors are limited to one. When I try, it freezes, apparently at the point when KMS tries to engage. If I connect additional displays after boot is complete, then all works as expected. See bug #1193640 and https://gitlab.freedesktop.org/drm/intel/-/issues/4762 When using Tawai's simpledrm kernels on TW and Plymouth is not installed, and with more than one display connected to this B560M-A motherboard's video output connectors, on proceeding from Grub menu, screens instantly turn black, and stay that way, with the system frozen and no possibility to remote login. With standard kernel, proceeding from Grub, the usual boot messages display until apparent KMS engagement, when the PC freezes. Using simpledrm should not result in instant and persistent black screen on proceeding from EFI Grub. Info following was captured during 15.3 multi-user boot with only one display connected: # inxi -Cyz CPU: Info: 6-Core model: 11th Gen Intel Core i5-11400 bits: 64 type: MT MCP cache: L2: 3 MiB Speed: 801 MHz min/max: 800/4400 MHz Core speeds (MHz): 1: 800 2: 801 3: 801 4: 808 5: 802 6: 801 7: 846 8: 837 9: 846 10: 800 11: 844 12: 846 # inxi -GMSayz System: Kernel: 5.3.18-59.37-default x86_64 bits: 64 compiler: gcc v: 7.5.0 parameters: BOOT_IMAGE=/boot/vmlinuz root=LABEL=<filter> noresume ipv6.disable=1 net.ifnames=0 consoleblank=0 3 nomodeset Console: pty pts/0 Distro: openSUSE Leap 15.3 Machine: Type: Desktop System: ASUS product: N/A v: N/A serial: N/A Mobo: ASUSTeK model: PRIME B560M-A v: Rev 1.xx serial: <filter> UEFI: American Megatrends v: 1203 date: 10/27/2021 Graphics: Device-1: Intel RocketLake-S GT1 [UHD Graphics 730] vendor: ASUSTeK driver: N/A alternate: i915 bus-ID: 00:02.0 chip-ID: 8086:4c8b class-ID: 0300 Display: server: X.org 1.20.3 driver: loaded: modesetting unloaded: fbdev,vesa alternate: intel Message: Advanced graphics data unavailable for root. -- You are receiving this mail because: You are on the CC list for the bug.