Bug 97855 - Cannot start X with SNA
Summary: Cannot start X with SNA
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Chris Wilson
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-09-18 21:21 UTC by Nick Sarnie
Modified: 2016-09-19 14:11 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
Xorg.log (46.98 KB, text/plain)
2016-09-18 21:21 UTC, Nick Sarnie 		no flags Details
dmesg (82.59 KB, text/plain)
2016-09-18 21:21 UTC, Nick Sarnie 		no flags Details
View All

Description Nick Sarnie 2016-09-18 21:21:10 UTC 
Created attachment 126607 [details]
Xorg.log

Hi,

If I try to use SNA, I cannot start X. The following assert fails: na_screen_init:1108 assertion 'to_screen_from_sna(sna) == NULL' failed


UXA and modesetting work fine. dmesg and Xorg.log are attached.

Let me know if you need anything else.

Thanks,
Comment 1 Nick Sarnie 2016-09-18 21:21:25 UTC 
Created attachment 126608 [details]
dmesg
Comment 2 Chris Wilson 2016-09-19 07:29:49 UTC 
Iirc that assert is there just to remind us that we could not rely on scrn->screen being set at that point.
Comment 3 Chris Wilson 2016-09-19 08:36:17 UTC 
commit b45dbdbd446108745b39b305303b457f5e876989
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Sep 19 09:34:32 2016 +0100

    sna: Update sanity check for next stage of Xorg ABI
    
    Now X will set the scrn->screen backpointer before Init, update our
    assertion to track.
    
    Reported-by: Nick Sarnie <commendsarnex@gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97855
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Comment 4 Nick Sarnie 2016-09-19 14:11:59 UTC 
Hi Chris,

The patch fixes the issue. 

Thanks,
Nick

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