Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370

On Fri, May 18, 2018 at 10:04:02PM +0200, Rafael J. Wysocki wrote: > On Fri, May 18, 2018 at 5:15 PM, Greg Kroah-Hartman > > Given that Windows works with this same set of ACPI tables, perhaps the > > requirement isn't that this memory location be uncached? > > > > We shouldn't have to fix up ACPI

Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370

On Fri, May 18, 2018 at 5:15 PM, Greg Kroah-Hartman wrote: > On Fri, May 18, 2018 at 06:08:24PM +0300, Heikki Krogerus wrote: >> >> Rafael, the problem here with these Dell laptops is that a memory page >> that is used as a mailbox for special communication between EC

Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370

On Fri, May 18, 2018 at 06:08:24PM +0300, Heikki Krogerus wrote: > > Rafael, the problem here with these Dell laptops is that a memory page > that is used as a mailbox for special communication between EC FW and > OS (called UCSI mailbox) should be in uncached memory, but the memory > is marked

Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9360/9370

Hi Paul, On Thu, May 17, 2018 at 03:34:49PM +0200, Paul Menzel wrote: > Dear Heikki, > > Note, this problem also exists on the Dell XPS 13 9360 (Kaby Lake) device. OK. Good to know. Though, we don't have one of those either. > On 05/17/18 10:59, Heikki Krogerus wrote: > > On Wed, May 16, 2018