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[Solved] Cannot boot liveCD after grub
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Darkshine
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PostPosted: Mon Oct 22, 2018 10:54 am    Post subject: [Solved] Cannot boot liveCD after grub Reply with quote

I've dowloaded the latest minimal install CD iso (install-amd64-minimal-20181021T214502Z.iso) and wrote it to the USB drive. After reboot when GRUB menu appeared, I selected the default "Boot LiveCD (kernel: gentoo)". After that booting process hangs with a black screen and a frozen (non-blinking) cursor in the upper left corner.

Then I tried the following options, the behavior was not changed from the above:
1. Choose "Boot LiveCD (kernel: gentoo) (cached)".
2. Edit GRUB command line. Added all of the following kernel options:
noapic
nodetect
nodhcp
nodmraid
nofirewire
nogpm
nohotplug
nokeymap
nolapic
nosata
nosmp
nosound
nousb
nox
nonfs
scandelay
3. Convert the given iso with "isohybrid -u" command.

This is on a brand new HP Elitebook 840 G5 laptop. Note that this liveCD loads well on old HP ProBook 640.

I also tried to load from old RescueCD (from another USB drive). After GRUB booting process also hangs, but the result is more problematic: I cannot boot the laptop anymore until its battery is completely discharged. Again, everything is good on old HP ProBook 840.

I believe some driver may hang when loading, but do not know how to detect it.

Please, advise how to proceed.


Last edited by Darkshine on Tue Oct 23, 2018 8:56 pm; edited 1 time in total
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joanandk
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PostPosted: Mon Oct 22, 2018 11:36 am    Post subject: Re: Cannot boot liveCD after grub Reply with quote

Darkshine wrote:

1. Choose "Boot LiveCD (kernel: gentoo) (cached)".


Did you try gentoo-nofb? I could imagine that Radeon hangs when trying to load the driver.
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Darkshine
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PostPosted: Mon Oct 22, 2018 2:47 pm    Post subject: Reply with quote

In GRUB menu there is no option to load gentoo-nofb. There are only 2 choises:
1. Boot LiveCD (kernel: gentoo)
2. Boot LiveCD (kernel: gentoo) (cached)

Both of them have the following commands:
Code:
linux /isolinux/gentoo root=/dev/ram0 init=/linuxrc dokeymap looptype=squashfs loop=/image.squashfs cdroot
initrd /isolinux/gentoo.igz


For the cached GRUB option the 1st command also has "docache" argument.

I tried to edit both of the commands and to change /isolinux/gentoo to /isolinux/gentoo-nofb as well as /isolinux/gentoo.igz to /isolinux/gentoo-nofb.igz. It resulted in the following errors:
Code:

error: file /isolinux/gentoo-nofb not found


and
Code:

error: file /isolinux/gentoo-nofb.igz not found


How to disable framebuffer for the LiveCD?
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Darkshine
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PostPosted: Mon Oct 22, 2018 11:47 pm    Post subject: Reply with quote

By the way, the video card is no radeon, it is Intel UHD Graphics 620.

What is its appropriate kernel module? Is it i915?
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Darkshine
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PostPosted: Tue Oct 23, 2018 8:56 pm    Post subject: Reply with quote

After disabling graphics on boot in BIOS menu now it is possible to start LiveCD.
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P.Kosunen
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Joined: 21 Nov 2005
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PostPosted: Wed Oct 24, 2018 11:08 am    Post subject: Re: [Solved] Cannot boot liveCD after grub Reply with quote

Darkshine wrote:
This is on a brand new HP Elitebook 840 G5 laptop. Note that this liveCD loads well on old HP ProBook 640.

I also tried to load from old RescueCD (from another USB drive). After GRUB booting process also hangs, but the result is more problematic: I cannot boot the laptop anymore until its battery is completely discharged. Again, everything is good on old HP ProBook 840.

I believe some driver may hang when loading, but do not know how to detect it.

Please, advise how to proceed.

Try with latest SystemRescueCd.

http://www.system-rescue-cd.org/Download/
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