Hmm, still not much detail but here tis:
commit f79e5368512b72bb463925983d265b070261b7aa
Author: Jim Qu <[email protected]>
Date: Mon Aug 27 13:37:38 2018 +0800
modesetting: code refactor for PRIME sync
The X will be crashed on the system with other DDX driver,
such as amdgpu.
show the log like:
randr: falling back to unsynchronized pixmap sharing
(EE)
(EE) Backtrace:
(EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e)
(EE) 1: /usr/lib/xorg/Xorg (0x55cb0151a000+0x1b5ce9)
(EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f1587a1d000+0x11390)
(EE)
(EE) Segmentation fault at address 0x0
(EE)
The issue is that modesetting as the master, and amdgpu as the slave.
Thus, when the master attempts to access pSlavePixPriv in ms_dirty_update(),
problems result due to the fact that it's accessing AMD's 'ppriv' using the
modesetting structure definition.
Apart from fixing crash issue, the patch fix other issue in master interface
in which driver should refer to master pixmap.
Signed-off-by: Jim Qu <[email protected]>
Reviewed-by: Alex Goins <[email protected]>
** Summary changed:
- X crashes when connecting to an external monitor via HDMI (I+A)
+ X crashes with "randr: falling back to unsynchronized pixmap sharing" when
connecting to an external monitor via HDMI (I+A)
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1789913
Title:
X crashes with "randr: falling back to unsynchronized pixmap sharing"
when connecting to an external monitor via HDMI (I+A)
Status in xorg-server package in Ubuntu:
Fix Released
Status in xorg-server-hwe-16.04 package in Ubuntu:
Invalid
Status in xorg-server source package in Xenial:
Won't Fix
Status in xorg-server-hwe-16.04 source package in Xenial:
Triaged
Status in xorg-server source package in Bionic:
Triaged
Status in xorg-server-hwe-16.04 source package in Bionic:
Invalid
Bug description:
[Impact]
X server crashes in certain cases on I+A hybrid machines with
modesetting+amdgpu drivers.
[Test case]
Connect an external monitor, check that it doesn't crash X.
[Regression potential]
This commit was provided by AMD and reviewed by an NVIDIA engineer, and after
a few iterations it got applied upstream. We'll test it with many driver
combinations (modesetting+amdgpu, m+nvidia, m+m...) to check that they all
(still) work.
--
Copied from a private bug:
- Steps to see the issue:
1. Connect a monitor to UUT via HDMI port
Expected Result:
Video outputs successfully in the monitor
Actual Result:
X crashes into a login screen
- BIOS: 0.7.3
- AMD driver release: 18.10, 18.20RC8 and 18.20RC9
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1789913/+subscriptions
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