I have a similar problem concerning to IO-APIC in my new laptop bought a few days ago. when i boot i receive the message "mp-bios bug: 8254 timer not connected to io-apic". after this, sometimes the boot process stops.. but generally it continue to run (during the remaining boot process, EVERY TIME ubuntu checks all filesystems.. and this activity requires EVERY TIME some minutes).
furthermore, if I boot with special options like noapic, there is the Kernel Panic . i attach some quotes from dmesg: -------------------- [4294670.901000] ACPI: Looking for DSDT ... not found! [4294670.931000] ENABLING IO-APIC IRQs [4294670.932000] ..TIMER: vector=0x31 apic1=0 pin1=0 apic2=-1 pin2=-1 [4294670.934000] ..MP-BIOS bug: 8254 timer not connected to IO-APIC [4294670.934000] ...trying to set up timer (IRQ0) through the 8259A ... failed. [4294670.934000] ...trying to set up timer as Virtual Wire IRQ... failed. [4294670.934000] ...trying to set up timer as ExtINT IRQ... works. ... [4294687.386000] bcm43xx: Error: Microcode "bcm43xx_microcode5.fw" not available or load failed. [4294687.401000] bcm43xx: Error: Microcode "bcm43xx_microcode5.fw" not available or load failed. ... [4294850.805000] Error calling BSTS [4294850.805000] A6M model detected, unsupported, trying default values, supply the developers with your DSDT -------------------- -- MP-BIOS bug on Asus Pundit1 AH2 (Kernel panic) https://launchpad.net/bugs/76989 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
