[Bug 107966] New: Graphical corruption with PSR - affects Plymouth only

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107966

            Bug ID: 107966
           Summary: Graphical corruption with PSR - affects Plymouth only
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: tseewald at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 141608
  --> https://bugs.freedesktop.org/attachment.cgi?id=141608&action=edit
dmesg with drm.debug=0x1e log_buf_len=1M

System environment:
-- chipset: KabyLake Refresh
-- system architecture: 64-bit
-- xf86-video-intel:
-- xserver: 1.20.1
-- mesa: 18.2
-- libdrm: 2.4.93
-- kernel: drm-tip (commit 0875e7885717d3d812941e8e2db1dc99728be1ff)
-- Linux distribution: Fedora 29 Beta (and Fedora 28)
-- Machine or mobo model: Dell Latitude 7490
-- Display connector: eDP

Reproducing steps:

Setup full disk encryption with LUKS/dm-crypt.
Use Plymouth[1] to provide a graphical interface for entering in the decryption
password.  This is bundled as part of the distribution since Fedora 10 and
setup automatically.
Enable PSR via i915.enable_psr=1.  I have confirmed there are no issues with
psr disabled.
While typing in the password, or otherwise updating the screen there is
graphical corruption, like grey static that will intermittently cover portions
of the screen.
If I do not cause the screen to update, e.g. just wait there at the Plymouth
lock screen, there is no graphical corruption.
Once I am past Plymouth and into the login manager/desktop there are no
video/display problems at all. 

[1] https://cgit.freedesktop.org/plymouth/

Additional info:

Because this occurs so early at boot I think this must be either a quirk with
my hardware, a PSR oddity, or a problem with Plymouth.

See attached files.  Please let me know if you would like further information
or clarification.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180918/799dfbf0/attachment.html>