| Summary: | [BYT] Internal display goes blank when setting up external monitor as clone | ||||||||||
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| Product: | DRI | Reporter: | Milan Bouchet-Valat <nalimilan> | ||||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||
| Status: | CLOSED INVALID | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||
| Severity: | normal | ||||||||||
| Priority: | medium | CC: | intel-gfx-bugs, przanoni | ||||||||
| Version: | unspecified | ||||||||||
| Hardware: | x86 (IA32) | ||||||||||
| OS: | Linux (All) | ||||||||||
| Whiteboard: | |||||||||||
| i915 platform: | BYT | i915 features: | display/eDP | ||||||||
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Description
Milan Bouchet-Valat
2015-02-14 13:23:11 UTC
It successfully clones eDP and VGA using the same pipe... You want to attach a drm.debug=0xe dmesg. Created attachment 113496 [details] drm.debug=0xe Here it is. Actually, I've experimented a bit more, and no consistent pattern appears wrt. cloned/main/secondary screens. It's just a mess. I noticed that after disconnecting the external monitor, I could even end up in a state where I could not get the internal screen to unblank. I had to put the laptop into suspend mode. Thus it may well be the same bug as https://bugzilla.kernel.org/show_bug.cgi?id=92241 There's also a crash that I missed (the Fedora bug reporting tool stopped showing a notification, but it's still there): https://bugzilla.redhat.com/show_bug.cgi?id=1189885 It would also be nice if you could reproduce the bug, then run "xrandr --verbose" and attach the output here, describing which screen is blank. Created attachment 113828 [details]
xrandr --verbose
Here it is. I connected the VGA external screen, and it was configured as a clone of the internal one: everything was fine on both screens. Then I defined the internal screen as the primary one, and it turned blank (the external monitor was set as secondary, as could be seen from the "2" in its corner). After 60s without any reaction from my part (I couldn't see the window anymore), gnome-control-center tried to restore the configuration to its previous state (cloned screens). As a result, the internal screen remained blank, but the desktop+windows appeared on the external screen. I ran xrandr at that point.
We seem to have neglected this bug. Apologies. Does the problem persist with latest kernels and userspace? I no longer have access to that machine and I had completely forgotten about this bug... (In reply to Milan Bouchet-Valat from comment #7) > I no longer have access to that machine and I had completely forgotten about > this bug... Thanks for the follow-up, sorry we couldn't help you. |
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