Bug 92484 - Can only go to console (fbcon/fbdev) once. Screen gets blank on console mode on next attempts.
Summary: Can only go to console (fbcon/fbdev) once. Screen gets blank on console mode ...
Status: CLOSED DUPLICATE of bug 92483
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-10-15 22:17 UTC by Rodrigo Vivi
Modified: 2017-01-10 12:22 UTC (History)
3 users (show)

See Also:
i915 platform:
i915 features: display/atomic

Attachments

Description Rodrigo Vivi 2015-10-15 22:17:51 UTC 
-- 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
ommit bbb1e52402b2a288b09ae37e8182599931c7e9df
uthor: Rob Clark <robdclark@gmail.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.
Comment 1 Jani Nikula 2015-10-16 07:32:46 UTC 
Apparently filed twice accidentally.

*** This bug has been marked as a duplicate of bug 92483 ***
Comment 2 Jari Tahvanainen 2017-01-10 12:22:22 UTC 
Closing resolved+duplicate as duplicate of closed+fixed.

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