[Bug 98690] [SKL bisected] System freeze when starting X using kernel 4.9-rc1 or later

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98690

--- Comment #72 from Peter Ujfalusi <peter.ujfalusi at gmail.com> ---
Created attachment 130990
  --> https://bugs.freedesktop.org/attachment.cgi?id=130990&action=edit
poll helper fix on top of next-20170421

Gleb,

can you check this patch on top of next-20170421 (most likely it will apply on
top of mainline as well)
if it does not break the optimus, can you also check with the following change:

diff --git a/drivers/gpu/drm/drm_probe_helper.c
b/drivers/gpu/drm/drm_probe_helper.c
index 1b0c14ab3fff..dbd227de1d37 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -160,7 +160,7 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
                 * was enabled before.
                 */
                poll = true;
-               delay = HZ;
+               delay = 0;
        }

        if (poll)


Thanks,
Peter

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