On Sun, Jun 8, 2014 at 9:53 PM, H. Peter Anvin wrote:
>
> This would point either to an iommu problem, or a problem in the driver
> where addresses somehow get truncated to 32 bits. Since this is a
> graphics driver it is extremely complex, and subtle problems could be
> buried somewhere inside i
On 06/06/2014 05:06 PM, Nikolay Amiantov wrote:
>
> I've played a bit with this theory in mind and found a very
> interesting thing -- when I reserve all memory upper than 4G with
> "memmap" kernel option ("memmap=99G$0x1"), everything works!
> Also, I've written a small utility that fills
On Sun, Jun 8, 2014 at 8:19 AM, Bjorn Helgaas wrote:
> [+cc linux-pci, linux-pm]
>
>
> I don't know what ACPI methods you're calling, but (as I'm sure you
> know) it's not guaranteed to be safe to call random methods because
> they can make arbitrary changes to the system.
Yes, I've tested this be
[+cc linux-pci, linux-pm]
On Fri, Jun 6, 2014 at 6:06 PM, Nikolay Amiantov wrote:
> Hello all,
>
> I'm trying to resolve a cryptic problem with Lenovo T440p (and with
> Dell XPS 15z, as it appears) and nvidia in my spare time. You can read
> more at [1]. Basically: when the user disables and then
Hello all,
I'm trying to resolve a cryptic problem with Lenovo T440p (and with
Dell XPS 15z, as it appears) and nvidia in my spare time. You can read
more at [1]. Basically: when the user disables and then re-enables
nvidia card (via ACPI, bbswitch or nouveau's dynpm) on new BIOS
versions, somethi
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