Created attachment 118907 [details]
-- system architecture: x86_64
-- kernel version: 4.3.0-rc5+ #12 SMP Thu Oct 15's drm-intel-nightly
-- Linux distribution: Fedora
-- Machine or mother board model: BDW
-- Display connector: eDP
-- Regression: Yes. Bisect points to
bb1e52402b2a288b09ae37e8182599931c7e9df is the first bad commit
uthor: Rob Clark <email@example.com>
ate: Tue Aug 25 15:35:58 2015 -0400
drm/fb-helper: atomic restore_fbdev_mode()..
-- Steps to reproduce:
1. Boot to X
2. Alternate first time to fbcon (Ctrl+Alt+F2)
3. Get back to X (Ctrl+Alt+F1)
4. Alternate second time to fbcon (Ctrl+Alt+F2)
Only the first time you go to fbcon you can actually get the console. After that you only get a blank screen.
-- Comments on dmesg:
My dmesg is full of custom printks..
at 30 sec it is the first time going to fbcon where everything works... On the second one at 53s it seems fb_helper->fb is corrupted.
*** Bug 92484 has been marked as a duplicate of this bug. ***
Unfortunately I can't remember what the solution was, but it is fixed on recent kernel.
(In reply to Rodrigo Vivi from comment #2)
> Unfortunately I can't remember what the solution was, but it is fixed on
> recent kernel.
Author: Daniel Vetter <firstname.lastname@example.org>
AuthorDate: Fri Oct 16 19:11:30 2015 +0200
drm/fb-helper: Fix fb refcounting in pan_display_atomic
Closing resolved+fixed, fix is in upstream as said in comment 3.