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xen hypervisor allocated kernel memory conflicts with E820 #8791
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from the error message given by Xen, this looks like a Xen's memory allocation issue. U may report this to Xen upstream as well. |
How/Where do I do that? I am far away from being an advanced user :( |
This was already discussed on XenDevel matrix channel, we tried few things, but no any conclusion yet... A proper email to xen-devel mailing list would be useful. |
sorry, but with out an example, I could not do anything. I am far a way from being as capable as a "normal" person, and doing that little thing is something that I cannot do. |
I too have ran into this, though not involving qubes. I signed up for that list and sent an email regarding this issue. I have copied it below for reference:
@i27i13 for future reference, you first send an email to |
Instead of moving the whole kernel image, remap ACPI NVS region in P2M map. Fixes QubesOS/qubes-issues#8791
How to file a helpful issue
Qubes OS release
Qubes OS 4.2.0
Brief summary
My journey started here:
Details about my hardware (which is not on the HCL list)
https://forum.qubes-os.org/t/cannot-install-qubesos-always-booting-to-a-black-screen/22559/1
Progress begins at post #22 and over!
https://forum.qubes-os.org/t/cannot-install-qubesos-always-booting-to-a-black-screen/22559/22
Black screen regardless of which option I select when trying to install Qubes OS.
I had the issue with 4.1.2, but could finally successfully install when selecting:
Install Qubes OS R4.1.2 - Latest kernel
Press e to modify booting
On the line:
multiboot2 /images/pxeboot/xen.gz
add:
dom0_max_vcpus=16
dom0_vcpus_pin
I tried the same with 4.2.0, without any luck.
I also tried (on the second line): acpi=off nomodeset=0, without any luck :/
When booting & selecting:
Install Qubes OS
Test media
Troubleshooting
Editing & adding:
vga=,keep
I can see that the last two lines were (otherwise, just a black screen):
xen hypervisor allocated kernel memory conflicts with E820
(XEN) Hardware Dom0 halted: halting machine
Then the screen freezes, nothing becomes responsive, and I must manually restart the PC.
When booting & selecting:
Install Qubes OS - Latest kernel
The last 3 lines I get are:
(XEN) Freed 644kB init memory
about to get started…
(XEN) Hardware Dom0 halted: halting machine
Then the screen freezes, nothing becomes responsive, and I must manually restart the PC.
Steps to reproduce
Boot & select the right "USB"
Expected behaviour
Boot with the 64 threads and install without any faults!
Actual behavior
Black screen, but modifying the booting by adding:
vga=,keep
allows me to see the generated errors.
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