I'm trying install kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/ on my notebook HP 455 with dedicated radeon graphics. I have successfully installed a newer kernel. But I got black screen after boot logo ubuntu. I have to press any key several times (15x?) and then desktop shows. I tried Ubuntu 18.04, 18.10, Xubuntu, Mint 19 with same result. Ubuntu 18.10 have native kernel 4.18 and It's work well. But kernel 4.18 in 18.04 doesn't work, same result with 4.16, 4.17, 4.19 and 4.20 RC. I also tried build kernel from source kernel.org and install using ukuu, black screen too. Could you please help me? Which log you need for investigation? Thank you.

Wow. The blank screen seems to have affected your post as well.

Maybe you should add some details, such as what distro, how you configured the kernel, what command line parameters you gave, and how you installed the new kernel.

1 members found this post helpful.

My post disappeared as well, thanks.

I am trying install kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline on my notebook HP 455 with dedicated radeon graphics. I have successfully installed a newer kernel. But I got black screen after boot logo ubuntu. I have to press any key several times (15x?) and then desktop shows. I tried Ubuntu 18.04, 18.10, Xubuntu, Mint 19 with same result. Ubuntu 18.10 have native kernel 4.18 and It's work well. But kernel 4.18 in 18.04 doesn't work, same result with 4.16, 4.17, 4.19 and 4.20 RC. I also tried build kernel from source kernel.org, black screen too. Could you please help me? Which log you need for investigation? Thank you

I didn't change settings to build kernel, I used precompiled, I used these commands:
sudo dpkg -i linux-headers-4.19.11-041911_4.19.11-041911.201812191931_all.deb
sudo dpkg -i linux-headers-4.19.11-041911-generic_4.19.11-041911.201812191931_amd64.deb
sudo dpkg -i linux-image-unsigned-4.19.11-041911-generic_4.19.11-041911.201812191931_amd64.deb
sudo dpkg -i linux-modules-4.19.11-041911-generic_4.19.11-041911.201812191931_amd64.deb

or

sudo ukuu --install-latest

Behavior is same on fresh install distros.

Now I have Mint 19 with
uname -r
4.20.0-042000-generic

Can you check for lines starting with "EE" in /var/log/Xorg.0.log?

I didn't find line starting with "EE" (error line) in /var/log/Xorg.0.log -> https://pastebin.com/tf5kDexa

But in /var/log/Xorg.1.log -> https://pastebin.com/rkfXsbF9

[ 3207.085] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 3207.085] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
[ 3207.085] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 3207.085] (EE) /dev/dri/card1: failed to set DRM interface version 1.4: Permission denied
[ 3207.090] (--) PCI:*(0:0:1:0) 1002:990b:103c:1952 rev 0, Mem @ 0xb0000000/268435456, 0xd6100000/262144, I/O @ 0x00006000/256, BIOS @ 0x????????/131072
[ 3207.090] (--) PCI: (0:1:0:0) 1002:6600:103c:1952 rev 0, Mem @ 0xc0000000/268435456, 0xd6000000/262144, I/O @ 0x00005000/256, BIOS @ 0x????????/131072

Next:

[ 3208.157] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 3208.157] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
[ 3208.158] (II) config/udev: Adding input device HDA ATI HDMI HDMI/DP,pcm=3 (/dev/input/event8)

Thank you for your time. Permissions are missing?

It loads OK with your old kernel, so I don't think it's permissions. I suspect some driver incompatibility. Do you have an Xorg.conf file? If so, try:

Xorg seems to not like people telling it what to do.

It will only make backup, won't it? Or something will change? I am not at the computer. I appreciate your advice.

Starting X with no conf let's it pick the values it prefers. You can move it back if it fails.

If you don't have a conf file you can try generating one and disable dri, but here there be dragons.

Note: to do this you should know how to start in text-only mode or have a bootable live image on USB in order to set things back. If you have trouble, ask for help.

I don't have xorg.conf at the path. I tried generate one, but it failed https://pastebin.com/PedwP98g.

Generated xorg.conf.new in home directory https://pastebin.com/s5yVCzyn

Xorg.1.log https://pastebin.com/AfsfhdWJ

I copied xorg.conf.new as xorg.conf to /etc/X11/ directory (without editing), nothing changed.

I don't understand what do you mean with ,,disable dri, but here there be dragons", my english is terrible. What is dri?

I'm not sure what else to try so I will pass on this link on the drivers available and how DRI is enabled.
https://linuxconfig.org/how-to-insta...c-beaver-linux

Well, this issue is obviously with Xorg and not the Kernel, so why not try to solve it like an Xorg issue?

1. Boot with no-xorg/graphical interface or single user mode (if needed, ubuntu??) (runlevel 2,3,4??)
2. Try something simple like an xorg configuration software (if available in your distro)
3. If network, try to install free ati driver from packages.x respository, if NO-Network, try to install free ati driver from CD/USB/LOCALREPOSITORY
4. Uninstall proprietary driver
5. Reboot and test with free driver
6. If needed, reinstall the proprietary driver

So, to conclude. You MUST install the proprietary driver TO the running Kernel, in most cases. In most cases they are not portable at all. Thus the uninstall/reinstall part.