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Since yesterday, my computer won't boot on ubuntu. I did some system updates and tried to install a software (vscodium via .deb file), apt failed giving me a message about my cpu (don't remember exactly what) so I restarted my computer, or at least tried to restart it. Windows 10 (dual boot) is working fine. I downloaded ubuntu 19.04 to boot on liveusb but it won't boot either. While trying to boot I encounter AMD-VI: Completion-Wait loop timed out message along with iommu ivhd0 IOTLB_INV_TIMEOUT or something.

I already had issues installing ubuntu and upgrade linux kernel but managed to workaround with iommu=soft stuff (Impossible to install Ubuntu 18.04 on a new computer). I didn't have any issues for several months so I thought it was behind me.

Computer specs :

  • Motherboard: b350 PC MATE
  • CPU: Ryzen 5 2600X
  • GPU: radeon RX 570
  • Ubuntu 18.04.2

At this point I really don't know what to do... I can't even launch recovery mode.

Bios is up-to-date

I managed to access my terminal, update-grub didn't help, but when I typed sudo apt update I had E: Error reading the CPU table. /usr/share/dpkg/cputable was missing, I copied a version of the file I found in /snap/core18/941/usr/share/dpkg/cputable and now I have E: Cannot find dpkg tuplet or triplet table

ThEBiShOp
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  • Have you tried with the IOMMU parameter again? –  Apr 24 '19 at 09:43
  • @GabrielaGarcia yes, iommu=soft, iommu=off, no difference – ThEBiShOp Apr 24 '19 at 10:05
  • @starkus no, I'm using the default splash screen, and I don't have onboard GPU – ThEBiShOp Apr 30 '19 at 08:41
  • Did you update the motherboard Bios? Since your board is 1st generation, and your CPU is 2nd generation Ryzen, therefore BIOS has to be updated. – Mitch May 05 '19 at 10:49
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    Restart your system and press shift key to enter into GRUB menu. Use Up/Dn arrows to select Ubuntu and then press e. A screen will appear, and look for the line linux. Use up/Dn arrows and reach that line. Press end key to reach end of line containing linux. Enter a space character followed by 3. Press Ctrl+X to boot. You will be taken to terminal TTY and there you enter your login username and password. Now you issue sudo update-grub . Finally type reboot. After rebooting reach GRUB menu pressing shift key and try to boot by selecting ubuntu. Please report. Thanks. – Marmayogi May 05 '19 at 16:02
  • @Mitch the bios is uptodate, it's the first thing I've tried – ThEBiShOp May 06 '19 at 16:56
  • @Marmayogi I did what you suggested, it didn't change a thing, but in the prompt, I tried sudo apt update and it told me : E: Error reading the CPU table. It appears that the file /usr/share/dpkg/cputable is missing – ThEBiShOp May 07 '19 at 07:46
  • Please run the following: sudo dpkg --configure -a , sudo apt-get update, and sudo apt-get upgrade. – Marmayogi May 07 '19 at 08:20
  • @Marmayogi sudo dpkg --configure -a gives dpkg: unknown command – ThEBiShOp May 07 '19 at 08:27
  • Please issue this command and find out dpkg binary is missing? ls -l /usr/bin/dpkg – Marmayogi May 07 '19 at 09:31
  • it's in french but it says something like ls: cannot access '/usr/bin/dpkg': no file or directory of this type – ThEBiShOp May 07 '19 at 10:17
  • We need to move to a chat session, @ThEBiShOp – Marmayogi May 07 '19 at 10:21
  • ok, how do we proceed ? – ThEBiShOp May 07 '19 at 10:28
  • Let us continue this discussion in chat. – Marmayogi May 07 '19 at 10:40

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