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Issue 670063 link

Starred by 2 users
Status: Untriaged
Owner: ----
Cc:
ka...@chromium.org
█ marc...@chromium.org
█ helenzhang@chromium.org
█ rjahagir@chromium.org
osh...@chromium.org
█ kkanchi@google.com
█ dbehr@chromium.org
mcasas@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 1
Type: Bug



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[Ninja] Display corrupted after switching between VT1 and VT2

Project Member Reported by son...@google.com, Nov 30 2016 
ChromeOS Version: 8992.0.0 

What steps will reproduce the problem?
(1) Sign in to the device.
(2) Switch between VT2 and VT1


What is the expected result?
Display should work properly.


What happens instead?
Most of the times display corrupted after switching between VT1 and VT2 


Please use labels and text to provide additional information.

Screenshots and Logs are present at https://pantheon.corp.google.com/storage/browser/chromiumos-test-logs/bugfiles/cros/Ninja/?debugUI=CLOUD

Comment 1 by ka...@chromium.org, Dec 1 2016 

sontis@, can this be reproduced with different external display? The display used in the bug is P2314T. 
What display port (HDMI or DP) is used?
What input on the monitor is used?
Do you use any adapter?

I remember a similar issue when connecting with HDMI-DVI adapter.

Comment 2 by marc...@chromium.org, Dec 1 2016

Cc: dbehr@chromium.org

Comment 3 by kkan...@chromium.org, Dec 1 2016 

The display P2314T (Dell Make) is on direct HDMI port (no adapter). The monitor is touch capable, but the touch input is not connected at this time.

Comment 4 by dbehr@google.com, Dec 9 2016 

I dont think touch has anything to do with it.
Looks like Chrome flips to a tiled buffer buffer but tiling is not enabled in display regs. 
dnicoara recently has made a change in Chrome that may fix it https://codereview.chromium.org/2498103002/
Does the build you are testing include it?

Comment 5 by rjahagir@chromium.org, Jan 4 2017 

Ninja is a chromebox not currently hooked up to an external monitor in lab, and so is failing graphics_VTSwitch. Is this issue still present?
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