Bug 93831

Summary:	Black Screen after enabling 8 monitros on 2 GPUs (R390x)
Product:	xorg	Reporter:	Andreas Wunder <awunder>
Component:	Driver/Radeon	Assignee:	xf86-video-ati maintainers <xorg-driver-ati>
Status:	RESOLVED MOVED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	blocker
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Andreas Wunder 2016-01-23 16:34:31 UTC

Hello,

i have an 8 monitor dual gpu setup and am unable to enable all of my 8 monitors. as soon as i do that, the screen becomes either black or the whole system becomes unresponsive, the GPU fans starting to run 100% (after a while) and i cant do anything but reset.

the gpus are OK - under windows they work and all of my 8 monitors work too.

i should add that even with fglrx there is no way for it to work.

it would be really awesome if there is a way to have my 8 screens. i am more than happy to do what it takes, let me know what you need.

thanks,
Andreas

Comment 1 Alex Deucher 2016-01-26 19:50:13 UTC

Please attach your xorg log and dmesg output and describe the arrangement (4x2, 8x1, etc.) of displays you are trying to configure.

Comment 2 Ernst Sjöstrand 2016-01-26 20:19:18 UTC

What's the max that does work? 6?

Comment 3 Andreas Wunder 2016-01-26 20:28:35 UTC

Thanks for coming back to me - i will try to deliver some logs over the weekend, right now i am tied with windows :(

7 were working (but a few only in mirror mode), on the 8th it was crashing - with radeon.

similar thing happened with fglrx, but it wasnt crashing there, it kept telling me there were no memory left to enable the monitor. my Radeon 390x have 8GB of memory each and my system has 48GB of RAM - so there's plenty of memory free.

what may be important, though: starting with a live linux dvd it usually enables only one display adapter, the second is disabled. sometimes its enabled (like on GNOME 3) but it lets me only extent the desktop to a total of 4 monitors, the other 2 (or 3) are mirrored..

on xfce4 i was able to enable the second adapter via xrandr but as soon as i started to enable another monitor, entire xorg crashed.

regarding the setup its like this:

M M M M --> Adapter 1
M M M M --> Adapter 2

thanks a lot!
Andreas

Comment 4 Martin Peres 2019-11-19 07:55:11 UTC

-- GitLab Migration Automatic Message --

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