No irq handler

[Connie480_ZorinOS]

hello im using Zorin os on my HP Comapaq CQ57 from 2011and i installed it with windows 7 in an dual boot evry time i start the laptop on the corner is and text what says No irq Handler for 1.55 what does it mean and no the laptop only supports legacy and does not have secureboot

[swarfendor437]

Hi, nothing to worry about. Follow the workarounds I found in my search:

" The "No irq handler for vector 1.55" error is a kernel-level debug message that typically appears during boot on systems with AMD Ryzen processors and certain motherboards. It is generally not a critical system failure and often does not affect normal operation, though it may appear alongside boot delays or issues like network connectivity problems.

Common Causes and Fixes:

• IOMMU (Input/Output Memory Management Unit) Setting :
  The most frequent cause is the IOMMU being enabled or set to "Auto" in the UEFI/BIOS settings . This is a known issue with AMD platforms, especially on B550/X570 motherboards.
  Solution : Enter your UEFI/BIOS setup during boot and disable IOMMU (look for options like "IOMMU", "AMD-Vi", or "SVM Mode"). Reboot to see if the error disappears.
• Outdated BIOS/UEFI Firmware :
  Many users have resolved the issue after updating their motherboard’s BIOS to the latest version.
  Solution : Check your motherboard manufacturer’s website (e.g., Gigabyte, ASUS, MSI) and update to the latest BIOS version.
• Kernel Boot Parameters (Temporary Workaround) :
  If you cannot update BIOS or disable IOMMU, you can suppress the error by adding kernel parameters:
  • Add acpi=noirq or iommu=off to the kernel command line in GRUB.
  • Edit /etc/default/grub , modify GRUB_CMDLINE_LINUX , then run sudo update-grub .
• Kernel Updates :
  The issue has been reported with older kernels (e.g., 5.8, 5.9). Upgrading to a newer kernel (5.15+) often resolves the problem, as later kernels include fixes for AMD platform quirks.

Note : If the system boots normally and performs as expected, the error may be harmless. However, if you experience boot hangs, hardware instability, or no network, focus on updating BIOS and adjusting IOMMU settings.

AI-generated answer. Please verify critical facts."

[Connie480_ZorinOS]

No there are No Problems with Boot i Just think that zorin ist very slow in this Laptop and the BIOS ist very Stricktet and there are No BIOS Update for this model anymore

[swarfendor437]

So you need to edit GRUB's kernel parameters - the one that starts with vmlinuz and possibly ends in "quiet splash". Leave a space and then type:

acpi=noirq

Save and exit. Then reboot for change to take effect.