Score:3

Black screen after kernel upgrade to 5.11.0-25-generic

ru flag

I'm using 3 monitors 1920x1080 (laptop and two external) on Ubuntu 21.04. After kernel upgrade from 5.11.0-18-generic to 5.11.0-25-generic the built-in monitor started to show only a black screen, the two other monitors work properly. If I try to start only with a laptop monitor it shows the black screen too. If I use a previous version of the kernel it works properly.

ch flag
Compare `/lib/modules/5.11.0-18-generic` and `/lib/modules/5.11.0-25-generic` folders - maybe you lost some custom modules used in previous kernel.
Deus avatar
jp flag
I'm having exactly the same issue but with Worksation and 3 1080p monitors (2x DP 1x DVI) With 5.8.0-63 it's working fine, with 5.11.0-25 only one screen starts black with the cursor. I'm currently using 2x Quadro 2000/2000D with Nvidia driver and Mosaic in order to be able to support 3 screens as the Quadro 2000 only supports 1 screen. It doesn't seem to be anything kernel modules related. I had plenty of issues setting up the Mosaic and the 3 screens so should be something more Xorg/Nvidia related.
Deus avatar
jp flag
root@Z600W:/lib/modules# ls -lA 5.11.0-25-generic/ | awk -F':[0-9]* ' '/:/{print $2}' build -> /usr/src/linux-headers-5.11.0-25-generic initrd kernel misc modules.alias modules.alias.bin modules.builtin modules.builtin.alias.bin modules.builtin.bin modules.builtin.modinfo modules.dep modules.dep.bin modules.devname modules.order modules.softdep modules.symbols modules.symbols.bin vdso
Deus avatar
jp flag
root@Z600W:/lib/modules# ls -lA 5.8.0-63-generic/ | awk -F':[0-9]* ' '/:/{print $2}' build -> /usr/src/linux-headers-5.8.0-63-generic initrd kernel misc modules.alias modules.alias.bin modules.builtin modules.builtin.alias.bin modules.builtin.bin modules.builtin.modinfo modules.dep modules.dep.bin modules.devname modules.order modules.softdep modules.symbols modules.symbols.bin updates vdso
Deus avatar
jp flag
This is what I've got during an apt upgrade booting with the 5.8.x kernel: Building module: cleaning build area... [ ! -h /usr/bin/cc ] && export CC=/usr/bin/gcc; make -k module KERNDIR=/lib/modules/5.11.0- 27-generic IGNORE_XEN_PRESENCE=1 IGNORE_CC_MISMATCH=1 SYSSRC=/lib/modules/5.11.0-27-generic /build LD=/usr/bin/ld.bfd; make -C uvm module KERNEL_UNAME=5.11.0-27-generic KBUILD_EXTMOD= /var/lib/dkms/nvidia-340/340.108/build/uvm............. It looks like the issue is nvidia driver related.
Deus avatar
jp flag
I can't reinstall drivers now due to the triple monitor settings and a specific Xorg config, but if you have nvidia gpu you can try, boot in rescue mode with the 5.11 kernel and attempt reinstalling nvidia proprietary drivers and try to boot again with the 5.11 kernel as usually.
Алексей Квитун avatar
ru flag
I surrendered after reinstalling Ubuntu, rolled back to the 5.11.0-16 version, and all work properly.
Score:0
de flag
rh9

edit /etc/default/grub

change GRUB_DEFAULT=0 to GRUB_DEFAULT="1>2"

run cmd update-grub and reboot

rh9 avatar
de flag
rh9
edit /etc/default/grub GRUB_DEFAULT="" GRUB_CMDLINE_LINUX_DEFAULT="nomodeset" GRUB_CMDLINE_LINUX="nomodeset" run cmd update-grub and reboot
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