Bug 203781 - AMDGPU Radeon VII crashes with dual monitors
Summary: AMDGPU Radeon VII crashes with dual monitors
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: x86-64 Linux
: P1 blocking
Assignee: drivers_video-dri
Depends on:
Reported: 2019-06-02 09:50 UTC by sehellion
Modified: 2019-09-28 05:08 UTC (History)
4 users (show)

See Also:
Kernel Version: 5.3, 5.2.x, 5.1.x
Tree: Mainline
Regression: No

dmesg with two monitors (78.65 KB, text/plain)
2019-06-02 09:50 UTC, sehellion
dmesg with one monitor - all fine (67.50 KB, text/plain)
2019-06-02 09:51 UTC, sehellion
dmesg 5.3-rc7 w/o Two Monitors (93.93 KB, text/plain)
2019-09-03 16:44 UTC, ReddestDream

Description sehellion 2019-06-02 09:50:33 UTC
Created attachment 283033 [details]
dmesg with two monitors

System information:
Mainline kernel 5.2.0-rc2
Mesa 19.1.0_rc4
Card Radeon VII
Monitors LG 24UD58-B via DP

When using only one monitor, then everything works fine. But when using two, the system starts to hang and try reset gpu.
Comment 1 sehellion 2019-06-02 09:51:32 UTC
Created attachment 283035 [details]
dmesg with one monitor - all fine
Comment 2 Tom B 2019-06-04 12:39:32 UTC
There is a bug report about this with more information over at freedesktop.org https://bugs.freedesktop.org/show_bug.cgi?id=110674

It affects 5.1 and 5.2 while 5.0 was fine.
Comment 3 Steffen Schröter 2019-08-07 07:10:17 UTC
I can confirm this bug, using kernels 5.1 or higher with two DP monitors connected leaves me unable to boot. Disconnecting one monitor makes it work as expected.

If i boot with a single monitor and then plug in the second one after booting the system crashes with graphical corruption.

On older kernels everything works fine.
Comment 4 ReddestDream 2019-08-08 14:56:26 UTC
I have the same monitors as sehellion and can confirm this issue with Radeon VII is still not fixed in 5.3-rc3.
Comment 5 ReddestDream 2019-08-28 00:01:52 UTC
Still not fixed on 5.3-rc6.
Comment 6 ReddestDream 2019-09-03 16:44:34 UTC
Created attachment 284781 [details]
dmesg 5.3-rc7 w/o Two Monitors

Still not fixed on 5.3-rc7. :(
Comment 7 ReddestDream 2019-09-20 15:52:04 UTC
This issue is still not fixed on release 5.3.

Tested as above using Arch Linux.
Comment 8 ReddestDream 2019-09-22 14:36:27 UTC
Progress on this issue has been made here:


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