I saw a almost full white screen. Is that the "blank screen" here? If possible, please attach a screenshot.

The full white is probably because we changed the user pod to use transparent background and have not checked how it looks on top of the app launch splash.

Probably too late for M61. Tag it for M62.

Attached is what I saw.

Deleted: kiosk_owner_auth.png 10.9 KB

	kiosk_owner_auth.png 10.9 KB View Download

Hi - Yes, full white screen is being referred as as a "blank screen" 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/972453885009579d30608ca22b9c11ec4ef1bbc9

commit 972453885009579d30608ca22b9c11ec4ef1bbc9
Author: Xiyuan Xia <xiyuan@chromium.org>
Date: Wed Sep 27 02:30:29 2017

kiosk: Fix regressions on network config flow

- Reset solidBackground flag when hiding kiosk launch splash screen
  so that the account picker screen for owner auth is shown properly;
- Fix network config screen not center aligned problem;

Bug:  763515 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I642890dd4d9ece0096127435764d63adffe227d0
Reviewed-on: https://chromium-review.googlesource.com/685368
Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504551}
[modify] https://crrev.com/972453885009579d30608ca22b9c11ec4ef1bbc9/chrome/browser/resources/chromeos/login/screen_app_launch_splash.js
[modify] https://crrev.com/972453885009579d30608ca22b9c11ec4ef1bbc9/chrome/browser/resources/chromeos/login/screen_arc_kiosk_splash.js
[modify] https://crrev.com/972453885009579d30608ca22b9c11ec4ef1bbc9/ui/login/account_picker/md_user_pod_row.js

Approved for 62, but please verify a Chrome with this change makes it through the PFQ before merging back. 

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e2a48914502c3569195f9764afe2a120d9627e2f

commit e2a48914502c3569195f9764afe2a120d9627e2f
Author: Xiyuan Xia <xiyuan@chromium.org>
Date: Mon Oct 02 16:02:51 2017

Merge "kiosk: Fix regressions on network config flow"

> - Reset solidBackground flag when hiding kiosk launch splash screen
>   so that the account picker screen for owner auth is shown properly;
> - Fix network config screen not center aligned problem;
>
> Bug:  763515 
> Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
> Change-Id: I642890dd4d9ece0096127435764d63adffe227d0
> Reviewed-on: https://chromium-review.googlesource.com/685368
> Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
> Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#504551}
> (cherry picked from commit 972453885009579d30608ca22b9c11ec4ef1bbc9)

TBR=xiyuan@chromium.org

Change-Id: I55b9d0005bb2da49cd7a918af954b0df06406190
Reviewed-on: https://chromium-review.googlesource.com/695643
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/branch-heads/3202@{#533}
Cr-Branched-From: fa6a5d87adff761bc16afc5498c3f5944c1daa68-refs/heads/master@{#499098}
[modify] https://crrev.com/e2a48914502c3569195f9764afe2a120d9627e2f/chrome/browser/resources/chromeos/login/screen_app_launch_splash.js
[modify] https://crrev.com/e2a48914502c3569195f9764afe2a120d9627e2f/chrome/browser/resources/chromeos/login/screen_arc_kiosk_splash.js
[modify] https://crrev.com/e2a48914502c3569195f9764afe2a120d9627e2f/ui/login/account_picker/md_user_pod_row.js

Verified in M62 Beta build 9901.44.0.