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Thread: Fresh install blinking cursor / underscore on Hyper-V

  1. #1

    Default Fresh install blinking cursor / underscore on Hyper-V

    Intel i9 9900K
    32GB RAM
    Radeon 380 & Nvidia 610
    Installed into Hyper-V VM on windows 10 21H1
    Passed through USB SSD is the only drive available to the VM
    Installed from freshly downloaded netinstall Tumbleweed .iso with matching SHA256 and passed media check
    openSUSE-Tumbleweed-NET-x86_64-Snapshot20211111-Media.iso
    Guided setup partitions, ticked the box for LVM and separate /home (XFS), all other options left at default

    Due to my <1mb internet, the install said is was going to take 4 hours, so I came back to it 6 hours later to find 3 orange dots with some sort of breathing effect animation, but they'd disappear and reappear roughly every 5 seconds. I didn't stare too long at it, so that's only vague memory. Task manager in windows showed a repeating pattern of heavy disk reads and light writes, repeating in time with the orange dots disappearing. I concluded that it must have crashed or be stuck on something, so I force reset the VM.
    On reboot, just got a blinking cursor. Ctrl + Alt + Fkeys does bring up tty# and I can log in to a command line, so I shutdown and went to google (actually duckduckgo but whatever)
    Googled around, found a lot of forum threads telling people to add nomodeset to grub boot options while starting up, so I tried that, but it didn't help.
    I noticed quiet in the boot options next to where I was putting nomodeset, so I figured I'd take that out and see what happened. Now after about a minute of blinking cursor it says "[ 52.489549][ C0] hv_balloon: Max. dynamic memory size: 8192 MB" and the blinking cursor is on the second line. Now if I Ctrl + Alt + Fkey it very briefly shows a login prompt, but immediately (split-second) goes back to hv_balloon and the blinking cursor.
    Adding nomodeset and removing quiet does the same thing as just removing quiet.




    tl;dr already tried nomodeset, didn't help, what's next?

  2. #2
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    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Hi and welcome to the Forum
    Might have better luck with WSL2?

    What about as well as nomodeset add plymouth.enable=0 (maybe even drop to text mode installer with textmode=1) but if you have such slow internet, it may be far better to find somewhere to download the full iso image very likely it can't get the drivers for the graphics to run.....
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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  3. #3

    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by malcolmlewis View Post
    Hi and welcome to the Forum
    Might have better luck with WSL2?

    What about as well as nomodeset add plymouth.enable=0 (maybe even drop to text mode installer with textmode=1) but if you have such slow internet, it may be far better to find somewhere to download the full iso image very likely it can't get the drivers for the graphics to run.....
    Thank you for your reply

    WSL2 still requires me to use windows, which I'm trying to get away from. Was hoping to set up Linux in a VM on a passed through drive so I could eventually switch to booting from it. The prevalence of Linux boot CDs led me to believe it would handle the hardware change, but since everything I've read online points to this being a graphics driver issue, and I have both AMD and Nvidia graphics cards, I'm starting to doubt that.

    Tried adding plymouth.enable=0 as well, same result. You seem to be talking about the installer with textmode=1 but I tried that anyway, same result.
    openSUSE is installed, it's just not starting the GUI, sitting on blinking underscore instead.

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    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by GeorgeIsNotAMonkey View Post
    Thank you for your reply

    WSL2 still requires me to use windows, which I'm trying to get away from. Was hoping to set up Linux in a VM on a passed through drive so I could eventually switch to booting from it. The prevalence of Linux boot CDs led me to believe it would handle the hardware change, but since everything I've read online points to this being a graphics driver issue, and I have both AMD and Nvidia graphics cards, I'm starting to doubt that.

    Tried adding plymouth.enable=0 as well, same result. You seem to be talking about the installer with textmode=1 but I tried that anyway, same result.
    openSUSE is installed, it's just not starting the GUI, sitting on blinking underscore instead.
    Hi
    Then yes, that's a graphics card issue. Not sure how hyper-v handles passthough, no issues see the other way and qemu. Now, I have a dedicated card and screen for gpu passthrough (and SSD via dedicated sata card).
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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  5. #5

    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by malcolmlewis View Post
    Hi
    Then yes, that's a graphics card issue. Not sure how hyper-v handles passthough, no issues see the other way and qemu. Now, I have a dedicated card and screen for gpu passthrough (and SSD via dedicated sata card).
    The only thing I'm passing through is the USB SSD, and that appears to be handled by the virtual SCSI controller, so passthrough possibly isn't even the right term to use.
    I believe Hyper-V can handle proper hardware passthrough, but I only skim read the tutorial, enough to know it's quite an involved process, I think significantly moreso than under Linux and QEMU.

    Is there anything I can do to make this work as-is? I can log into a command line, so I can install/uninstall packages if need be, or access log files. Most of the more advanced help I've found while searching around has been for Ubuntu or Arch, nothing for openSUSE, so I have no idea where to start.

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    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by GeorgeIsNotAMonkey View Post
    The only thing I'm passing through is the USB SSD, and that appears to be handled by the virtual SCSI controller, so passthrough possibly isn't even the right term to use.
    I believe Hyper-V can handle proper hardware passthrough, but I only skim read the tutorial, enough to know it's quite an involved process, I think significantly moreso than under Linux and QEMU.

    Is there anything I can do to make this work as-is? I can log into a command line, so I can install/uninstall packages if need be, or access log files. Most of the more advanced help I've found while searching around has been for Ubuntu or Arch, nothing for openSUSE, so I have no idea where to start.
    Hi
    Not sure, just have to look at hyper-v graphics options? Is this a laptop or desktop with discrete card?

    My qemu setup fyi https://forums.opensuse.org/showthre...50#post2907350
    Last edited by malcolmlewis; 14-Nov-2021 at 16:43.
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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    please show your appreciation and click on the star below... Thanks!

  7. #7

    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by malcolmlewis View Post
    Hi
    Not sure, just have to look at hyper-v graphics options? Is this a laptop or desktop with discrete card?

    My qemu setup fyi https://forums.opensuse.org/showthre...50#post2907350

    Hyper-V doesn't have graphics options, it's just a virtual GPU, super standard VM. It's more or less the same as a VirtualBox VM with everything left at default, the only thing I customized is to make it use a physical drive instead of a virtual disk, but the physical drive is still connected to a virtual controller in the VM, so it should all be super standard.
    It's a desktop with 2 discrete cards, neither of which are being passed through.

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    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by GeorgeIsNotAMonkey View Post
    Hyper-V doesn't have graphics options, it's just a virtual GPU, super standard VM. It's more or less the same as a VirtualBox VM with everything left at default, the only thing I customized is to make it use a physical drive instead of a virtual disk, but the physical drive is still connected to a virtual controller in the VM, so it should all be super standard.
    It's a desktop with 2 discrete cards, neither of which are being passed through.
    Hi
    Have you configured the reserved RAM setting (that C0 warning/error), from what I read the default is 512MB, can you set this to 2GB?
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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  9. #9

    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by malcolmlewis View Post
    Hi
    Have you configured the reserved RAM setting (that C0 warning/error), from what I read the default is 512MB, can you set this to 2GB?
    Tried setting it to 2GB, no change. Disabled dynamic memory entirely so it just uses 8GB from the start, no change. I'm going to leave dynamic memory turned off.

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    Default Re: Fresh install blinking cursor / underscore on Hyper-V

    Quote Originally Posted by GeorgeIsNotAMonkey View Post
    Tried setting it to 2GB, no change. Disabled dynamic memory entirely so it just uses 8GB from the start, no change. I'm going to leave dynamic memory turned off.
    Can you download a Tumbleweed LIVE USB setup and boot the vm with that as a test, I wonder if the install completed...
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    SUSE SLE, openSUSE Leap/Tumbleweed (x86_64) | GNOME DE
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