Bug 80825 - Output is disabled on VT switch
Summary: Output is disabled on VT switch
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/geode (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: X.org Geode Mailing List
QA Contact: X.org Geode Mailing List
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-07-02 18:38 UTC by Daniel Glöckner
Modified: 2015-12-02 12:21 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
Possible fix (2.21 KB, patch)
2015-12-01 23:49 UTC, Connor Behan 		no flags Details | Splinter Review
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Description Daniel Glöckner 2014-07-02 18:38:55 UTC 
When using a dumb framebuffer driver like vesafb, a switch from X to another VT produces a black screen. This is because of vg_set_custom_mode disabling the CRT output in DF_DISPLAY_CONFIG and DF_VID_MISC.

Before RandR support was introduced (i.e. before d681a844e), LXLeaveGraphics had a final call to lx_enable_dac_power that reenabled the output.
Comment 1 Martin-Éric Racine 2014-10-20 15:09:54 UTC 
Thanks for reporting this.

Patches are warmly welcome.
Comment 2 Connor Behan 2015-12-01 23:49:49 UTC 
Created attachment 120250 [details] [review]
Possible fix

If there isn't some deep reason why these calls were removed, then they can certainly be added back.
Comment 3 Connor Behan 2015-12-01 23:50:49 UTC 
s/explicity/explicit/ in my commit summary.
Comment 4 Martin-Éric Racine 2015-12-02 09:43:41 UTC 
Thanks for the patch.

Last time I checked, the call had been moved to somewhere else but, for some reason, no longer works as expected.
Comment 5 Martin-Éric Racine 2015-12-02 10:28:54 UTC 
Tested and confirmed to work.
Comment 6 Martin-Éric Racine 2015-12-02 12:21:33 UTC 
Patch merged into the Git repository. Marking as fixed.

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