[CentOS] C8.1 Grub problem

Mon Apr 6 09:54:32 UTC 2020
Georgios <gpdsbe+centos at mailbox.org>

Hi there!
I had a similar problem recently with grub. No idea why it doesnt work.
Try using grubby instead of grub2-mkconfig if you want the system to
keep your kernel parameters between boots.

Something like:

sudo grubby --args="i915.modeset=0 rd.driver.blacklist=i915" --update-

Hope it helps!
Have a nice day!

On Mon, 2020-04-06 at 11:42 +0200, Alessandro Baggi wrote:
> Hi list,
> I reinstalled on my workstation CentOS 8.1.
> I explain: I'm a KDE user but packages shipped from EPEL currently
> are 
> buggy so I prefer a stable and functioning system to work with. So I 
> tried to remove KDE workgroup and installed group "Workstation" but
> the 
> system bricked so I reinstalled with GNOME.
> I've an nvidia gtx 1050ti GPU so I installed kmod-driver from
> rpmfusion. 
> After the installation of Nvidia driver, I rebooted, gdm start and
> after 
> I perform the login the system freeze. So this problem happened to
> me 
> with C7.5 and nvidia driver. In my case I need to blacklist i915
> module 
> and system works.
> Also in this case I tried to boot centos changing grub kernel
> parameters 
> pressing 'e' in the grub menu and adding "i915.modeset=0 
> rd.driver.blacklist=i915", booted and system works.
> So I tried to make this permanent updating grub configuration adding
> the 
> previous directives (and removed rhgb and quiet) to
> /etc/default/grub 
> and run grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg.
> Reboot the system and checked again kernel parameters on grub menu
> and 
> seen that nothing changed. Booted and freezed.
> I checked /boot/efi/EFI/centos/grub.cfg and kernelops has the new 
> directives.
> Seems that grub configuration does not take effect.
> I made another test inside a VM installed with minimal selection and 
> remove rhgb and quiet parameters and worked fine. The vm is BIOS and
> my 
> workstation UEFI.
> How I can solve this problem? Currently to boot my system I need
> always 
> to add this params.
> Thank you in advance
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