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Re: pci_alloc_irq_vectors fails ENOSPC for XPS 13 9310

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On Wed, Nov 11 2020 at 09:53, Thomas Krause wrote:
> Am 10.11.20 um 09:33 schrieb Kalle Valo:
>>> I was told that on Dell XPS 15 (with a working QCA6390 setup) there's a
>>> separate "Virtualisation" setting in BIOS. See if you have that and try
>>> enabling it.
>> I was informed about another setting to test: try disabling "Enable
>> Secure Boot" in the BIOS. I don't know yet why it would help, but that's
>> what few people have recommended.
>>
>> Please let me know how it goes.
>>
> I have two options under "Virtualization" in the BIOS: "Enable Intel 
> Virtualization Technology (VT)" and "VT for Direct I/O". Both were

VT for Direct I/O enables the IOMMU and the interrupt remapping unit,
but the kernel can't use it because the ACPI tables are busted.

> enabled. Secure boot was also turned off. BIOS version is also at the 
> most current version 1.1.1. Because of the dmesg errors Thomas Gleixner 
> mentioned, I assume it would be best to contact Dell directly (even if 
> I'm not sure if and how fast they will respond). If the driver would

Good luck.

Thanks,

        tglx



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