After doing an update, booting, grub screen shows. Once I entered, I got a totally blank screen.
1 Answer
Solution is to boot into root terminal and delete this file.
sudo rm /lib/firmware/amdgpu_raven_dmcu.bin
Worth bumping anyway as the last update restored that file which is causing the problem somehow.
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update: doing a clonezilla backup first, to be safe. I then went here to install the latest kernel kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc1 downloading 4 of them, not the latency and doing a dpkg -i *.deb - make sure you don't have other deb files there . system complained about unsigned kernel, so I had to disable secure boot in BIOS. I then reinstated the deleted /lib/firmware/amdgpu_raven_dmcu.bin which I had copied to /lib/firmware/amdgpu_raven_dmcu.bin.BAK. and that new kernel now boots ok. also suspend seems to be working,– pierrelyCommented Jul 26, 2019 at 4:48
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but I still need to unplug usb mouse and keyboard else they still get lost on resume. early days yet as suspend is semi random so far this year with other kernels. and F1 2017 from Steam locked up after complaining about incompatible drivers, though I can work on it. hopefully I can get it to run with better graphics.– pierrelyCommented Jul 26, 2019 at 4:48
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I had to revert back as new graphics problems were too much, lines all over the place, mispositioned windows etc. note that it was not the apt update on the latest official kernel that allowed for the raven file to be in place, it was this latest buggy 5.3r1 kernel. suspend also went well at first but then not at all, or lost USB, or even the laptop keyboard.– pierrelyCommented Jul 26, 2019 at 5:43
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interesting comments here. community.amd.com/thread/238156– pierrelyCommented Jul 27, 2019 at 5:20
nomodesetto the GRUB options helped... but in the meantime, I've upgraded to F21 BIOS. Between that and the current kernel version, a lot seems worse, backlight control seems to have stopped, and after suspend the screen is blank.