Manjaro does not boot after update - emergency shell

[yarnabrina]

Sure, these are the results:

(standard) ~ >>> sudo mhwd-kernel -li                                          
Currently running: 5.10.2-2-MANJARO (linux510)
The following kernels are installed in your system:
   * linux510
   * linux54
(standard) ~ >>> sudo ls /etc/mkinitcpio.d/*.preset                            
/etc/mkinitcpio.d/linux510.preset  /etc/mkinitcpio.d/linux54.preset

By the way, I just copy-paste from your post. I have no idea what does this mean, and how to boot using a kernel of specified choice:

@stephane

you can only boot on 5.4 , modules are missing in 5.10 ( includinf failsafe )

[stephane]

then

sudo pacman -Syy
sudo mhwd-kernel -r linux510 
sudo mhwd-kernel -i linux510

it was log from one day before in your link gofile ( error on modules on 5.10 )

[yarnabrina]

If I understand correctly, this reinstalls 5.10 kernel. If you don’t mind, can you please explain why are you suggesting so? I just recovered my laptop, so don’t want to take risk. I hope you understand.

But while I ran the solution, hasn’t it done the same thing?

@moson

pacman -S linux510

And seeing the post below by @moson, I’m more confused now, as the output does say so.

@yarnabrina

Currently running: 5.10.2-2-MANJARO (linux510)

[moson]

@stephane

you can only boot on 5.4

? @yarnabrina is running on 5.10 already, no?

[pawelx]

Hello. I seem to have the same problem - get the same message at boot. But the computer didn’t see usb drives. I’ve tried changing BIOS settings, using other USB slots, nothing seemed to help. So I removed the SSD, and then the USB was detected and the live system started. I followed the steps described here and the kernel was updated, the updates checked (nothing needed to be changed), but when I executed sudo update-grub, I got some errors:
grub-probe: error: cannot find a GRUB drive for /dev/sda1. Check your device.map.
(I can’t include the screenshot)
After rebooting, I no longer get the message, but I’m greeted with a blank screen - the system won’t load.

[rohit901]

Hey i faced same problem. My system is dell inspiron 15 with Nvidia gtx 1050 graphic card and i have dual booted with windows 10. After latest update my system broke suddenly.
Tried the steps mentioned in the solution posted by OP but when booting live usb I selected non free drivers, so I got some error when following the solution steps pls see the screenshot. I clicked on yes on all options and decided to proceed. Can someone help me understand the reason for this I’m new to Linux and would want to know how it’s working.

Sceenshot: https://drive.google.com/file/d/1KvTfJ6zTzD49dQh06OkZPkvfDZ3pI_cj/view?usp=drivesdk

As of writing this the system is installing lots of packages, will let you updated if I’m able to boot in after continuing with the solution steps.

EDIT: I was not able to fix the problem, so i decided to boot into live usb again this time with free drivers set instead of non free and I also realized that during my last attempt, I had opened up a new terminal after executing sudo manjaro-chroot -a, thus I think this might be the reason for the solution not working. this time I remained in same terminal and continued with sudo pacman -Syyu and other command. Now I booted into my OS, but I did not recall getting grub menu option to select windows or manjaro and also nvidia drivers are not installed atm, so should I auto install properiatery drivers from system settings?

So my problems are:

1. Not able to see the grub menu so that I can select windows or manjaro
2. nvidia module are not installed? please refer the attachment. I use optimus manager and mostly select it to use my GPU, and it had been using my GPU (hybrid mode I guess) before the update but now after the update it is in Intel mode only, when I try to switch, I get this warning.

[NickTouik]

I had the exact same isssue, but I had some older kernels installed. I was able to resolve the issue by booting an older kernel in the boot menu, which worked in my case. I didn’t need to to any chrooting and running:

pacman -Syyu
pacman -S linux510

Did the trick. I guess it was a good thing I had those kernels still lying around…

[Yochanan]

Always use MHWD to install / uninstall kernels:

sudo mhwd-kernel -i linux510

Or use the GUI from Manjaro Settings Manager > Kernels