[PATCH] Fix lock up when switching off discrete graphics card in Dell XPS 9560 https://bugzilla.kernel.org/show_bug.cgi?id=156341

[Tobias Schumacher]

Signed-off-by: Tobias Schumacher <tobe.schumac...@gmail.com>
---
 drivers/acpi/blacklist.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 4421f7c..7945f2f 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -188,6 +188,20 @@ static struct dmi_system_id acpi_rev_dmi_table[] 
__initdata = {
                      DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 3350"),
                },
        },
+       /*
+        * Resolves issues that cause the system to lock up
+        * under certain conditions when the discrete graphics
+        * card is turned off
+        */
+       {
+        .callback = dmi_enable_rev_override,
+        .ident = "DELL XPS 15 (2017)",
+        .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9560"),
+               },
+       },
+
 #endif
        {}
 };
-- 
2.9.3