Hi, On Thu, Jun 8, 2017 at 1:05 AM, Jérôme de Bretagne <jerome.debretagne@xxxxxxxxx> wrote: > Hi, > > Here is some feedback for Dell Latitude 7275, as suggested by Srinivas > in https://bugzilla.kernel.org/show_bug.cgi?id=195897#c15 . > > For some context on that model, suspend-to-RAM is not safe as the > system hangs (raised in the above bug report). I'm wondering if this > is expected somehow, due to S3 not being supported on that model, as > discussed for the XPS 13 9365. Maybe Mario or someone else from Dell > would be able to confirm this point. > > While it's not set by default, suspend-to-idle works fine. However the > power button needs a very long press of about 6-7s to trigger the > wake-up (quite surprising at first). > > I've applied Rafael's patch series on 4.12-rc4, with the 3rd patch > modified to add the Latitude 7275 DMI values, to check if the proposed > fix for the XPS 13 9360 and 9365 could also work for this other quite > recent Dell model. > > Sadly with the latest BIOS 1.1.31, this patch set doesn't seem to > change anything: the long press is still needed. > > Surprisingly and more for reference I suppose, this patch set works as > intended with an older BIOS 1.1.20 : the system can then be woken up > from system-to-idle with a usual short press. Cf. > https://bugzilla.kernel.org/show_bug.cgi?id=195897#c9 for more details > about why I've downgraded to and tested that specific older BIOS. > > I'm wondering if there could be ways to modify slightly this patch > series to also cover the Latitude 7275 when running the current BIOS. Maybe. I'll look at the acpidump output data attached to the bug entry. > If I can provide any inputs that could be useful to investigate, > please let me know. I only see one acpidump output attachment in the bug entry, so please also attach the one from the other BIOS revision. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
