Bug 98605

Summary: modesetting doesn't fall back to shm if glamor_init() fails
Product: xorg Reporter: Javier <j.e.vasquez.v>
Component: Server/Acceleration/glamorAssignee: Xorg Project Team <xorg-team>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium CC: j.e.vasquez.v
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Xorg log with glamor warning and server error none

Description Javier 2016-11-05 22:51:30 UTC 
Created attachment 127794 [details]
Xorg log with glamor warning and server error

On a Toshiba NB505 I have no problem when using the "xf86-video-intel" driver.  However when trying to use the "modesetting" driver now embedded into the Xorg server I get:

[    26.287] (WW) glamor requires at least 128 instructions (64 reported)
[    26.287] (EE) modeset(0): Failed to initialize glamor at ScreenInit() time.
[    26.287] (EE) 
Fatal server error:
[    26.287] (EE) AddScreen/ScreenInit failed for driver 0
[    26.287] (EE) 
[    26.287] (EE)

I'm using the "i915" linux gpu driver, while lspci shows:

VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller

And according to the specs under:

https://www.cnet.com/products/toshiba-nb505-n500bl-10-1-atom-n455-1-gb-ram-250-gb-hdd-us/specs

Then:

CPU                 Intel Atom N455 / 1.66 GHz
...
Graphics Processor  Intel GMA 3150

Sounds like a bug in the glamor acceleration...
Comment 1 Adam Jackson 2018-06-12 16:03:41 UTC 
Updating the summary to be a bit more clear. We could fall back softly to shm, we're just not trying.
Comment 2 GitLab Migration User 2018-12-13 18:25:46 UTC 
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