On Thursday, February 18, 2016 03:24:10 PM Peter Humphrey wrote: > On Thursday 18 February 2016 15:11:44 J. Roeleveld wrote: > > On Thursday, February 18, 2016 12:05:14 PM Peter Humphrey wrote: > --->8 > > > > Now that I think about it, I did update the AMI BIOS several weeks ago. > > > It went from 1102 to 2101 - a bit of a step. Maybe that's what's broken > > > my system - well, this bit of it, anyway. > > > > Could very well be the case. > > In which case I'm stuck, because the BIOS's ez-flash utility won't let me go > backwards in versions. Meanwhile I've flashed the latest one again just to > see if it would make any difference (it hasn't), this time remembering to > reset to defaults first. > > There is a BIOS option called "Addon ROM display mode" which seems to ask > whether an expansion card's ROM should override the installed default, > though it's hard to tell with the "pidgin" English. I'll try flipping that > and see what happens. Later: nothing, as far as I can see.
You could try (depending on age and how helpful supplier is) a different method to downgrade the BIOS. Some mainboards have the option to downgrade by adding a different flash-rom with an older version and/or you could have it flashed differently. > > Also, not sure if the following might help: > > # zgrep -i iomm /proc/config.gz > > CONFIG_GART_IOMMU=y > > # CONFIG_CALGARY_IOMMU is not set > > CONFIG_IOMMU_HELPER=y > > CONFIG_IOMMU_API=y > > CONFIG_IOMMU_SUPPORT=y > > # Generic IOMMU Pagetable Support > > CONFIG_IOMMU_IOVA=y > > # CONFIG_AMD_IOMMU is not set > > CONFIG_INTEL_IOMMU=y > > CONFIG_INTEL_IOMMU_DEFAULT_ON=y > > CONFIG_INTEL_IOMMU_FLOPPY_WA=y > > # CONFIG_IOMMU_DEBUG is not set > > # CONFIG_IOMMU_STRESS is not set > > Mine's the same. > > > # zgrep -i dmar /proc/config.gz > > CONFIG_DMAR_TABLE=y > > Ditto. > > My options now seem to be to replace the motherboard, replace the display > card, both of which are now just over six years old - or drop BOINC projects > that use VirtualBox. > > Thanks for the help, Joost. If anyone else has any ideas I'd be grateful to > hear them too. Current thoughts: I/O APIC in the VM settings. Try toggling it (same as other options) Especially if they are different between VMs that work and don't work. My kernel version: # uname -a Linux andromeda 4.1.12-gentoo #1 SMP PREEMPT Wed Nov 25 20:47:48 CET 2015 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux Haven't upgraded this system yet to a new kernel. That is planned for next week. I run Gentoo-stable on this laptop. -- Joost
