Bug 99043 - No devices detected on linux-20161209. 'open("/dev/dri/card0", O_RDWR|O_NONBLOCK) = -1 ENODEV (No such device)'
Summary: No devices detected on linux-20161209. 'open("/dev/dri/card0", O_RDWR|O_NONBL...
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-12-10 11:22 UTC by Rafael Ristovski
Modified: 2017-07-24 22:39 UTC (History)
2 users (show)

See Also:
i915 platform: HSW
i915 features:

Attachments
strace of Xorg (4.08 KB, text/plain)
2016-12-10 11:22 UTC, Rafael Ristovski 		no flags Details
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Description Rafael Ristovski 2016-12-10 11:22:27 UTC 
Created attachment 128402 [details]
strace of Xorg

Upon booting linux-next/20161209 without any errors/warnings in dmesg output, initiating Xorg fails with "No screens found"/"No devices detected".

After running X through strace I have noticed it fails to open the /dev/dri/card0 device which can be confirmed by running a simple `cat /dev/dri/card0` which returns "No such device".

linux-next/20161202 works just fine.

Strace below.
Comment 1 Rafael Ristovski 2016-12-17 17:39:02 UTC 
Identified: http://www.gossamer-threads.com/lists/linux/kernel/2588863
Comment 2 Rafael Ristovski 2016-12-20 14:55:59 UTC 
Fixed by commit dc91a44d1caa102c0c26cfa6db007edeb67313f5

https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=dc91a44d1caa102c0c26cfa6db007edeb67313f5

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