Bug 208573
Summary: | Black screen on boot if two displays plugged in with NAVI 10 | ||
---|---|---|---|
Product: | Drivers | Reporter: | Thomas Langkamp (thomas.langkamp) |
Component: | Video(DRI - non Intel) | Assignee: | drivers_video-dri |
Status: | CLOSED DUPLICATE | ||
Severity: | normal | CC: | alexdeucher, andrej |
Priority: | P1 | ||
Hardware: | x86-64 | ||
OS: | Linux | ||
Kernel Version: | 5.8.0-2-MANJARO | Subsystem: | |
Regression: | No | Bisected commit-id: | |
Attachments: |
dmesg just after plugging in second display
xorg.log just after connecting second display reproducable error messages after suspend, then reboot signature.asc |
Description
Thomas Langkamp
2020-07-15 18:36:51 UTC
Please attach your full dmesg output and xorg log (if using X). Created attachment 290305 [details]
dmesg just after plugging in second display
Created attachment 290307 [details]
xorg.log just after connecting second display
Maybe it has something to do with my X470 Board not being PCI-E 4.0? I switched to a better PSU today, but that did not help either. Both screens completely black until I pull one cable and reboot. Created attachment 290817 [details]
reproducable error messages after suspend, then reboot
This error message is reproducable if I boot
- with 1 display
- on KDE connect second display
- suspend, then wakeup (both screens work normal until this point)
- then reboot => error message, then black screen on one and green screen on secondary display.
Because my Mainboard got a new Bios I tried that with no effect. But I realized, that I get the black screen only if I dial in the 3200 Mhz XMP Profile of my RAM. If not - there is no black screen with 2 displays on the new BIOS. On the old BIOS XMP Profile or not made no difference. Thus the mainboard may be part of the problem.
(In reply to Thomas Langkamp from comment #5) > Created attachment 290817 [details] > reproducable error messages after suspend, then reboot > > This error message is reproducable if I boot > - with 1 display > - on KDE connect second display > - suspend, then wakeup (both screens work normal until this point) > - then reboot => error message, then black screen on one and green screen on > secondary display. > > Because my Mainboard got a new Bios I tried that with no effect. But I > realized, that I get the black screen only if I dial in the 3200 Mhz XMP > Profile of my RAM. If not - there is no black screen with 2 displays on the > new BIOS. On the old BIOS XMP Profile or not made no difference. Thus the > mainboard may be part of the problem. Still, Mainboard being part of the problem or not - all was fine til I switched the Fury X to the 5700 XT (first an ASROCK, now a Gigabyte one). I found a similar bug here: https://bugzilla.kernel.org/show_bug.cgi?id=206903#c51 Do you only get the MCE errors when you set the XMP profile? Created attachment 290821 [details] signature.asc Yes. With the new BIOS this is reproducible only with XMP enabled. In the other bugreport I read about amdgpu.ppfeaturemask=0xffffbffd I just tried it. Until now this seems to fix it, even with XMP profile enabled! I will report back if I get a black screen again. As far as I know with 2 monitors attached the VRAM is always clocked high, so it makes sense that disabling the VRAM power management through this featuremask works around the issue. But surely a proper fix would be appreciated. Am 10.08.20 um 16:33 schrieb bugzilla-daemon@bugzilla.kernel.org: > https://bugzilla.kernel.org/show_bug.cgi?id=208573 > > --- Comment #8 from Alex Deucher (alexdeucher@gmail.com) --- > Do you only get the MCE errors when you set the XMP profile? > You can probably mark this bug as a duplicate of 208573 then. 206903 *** This bug has been marked as a duplicate of bug 206903 *** This bug is gone! I think since 5.8.1 or so. I waited a couple of weeks to see if it comes back, but I can now boot, suspend and whatever with both screens connected. Cheers :D And here we go, the bug is back in 5.12.5 or so (probably also in earlier 5.12 kernels). In my case this occurs with 4 virtual and 2 physical screens connected (dual 5k MST) and a Radeon Pro W5700. The issue this was deduplicated against has lots of extra investigation. |