Unable to reproduce the issue on reported chrome version 61.0.3163.100 as we have checked it on Mac 10.12.6 which has Intel graphics of 5000 by enabling hardware acceleration.

@Reporter: Could you please confirm do we need to have Intel graphics 6000 in order to reproduce the issue? 

Thanks!

Experiencing the same issue, also only with hardware acceleration. Colours change as you scroll (see attached screenshots of the test case):

Windows 10 - 1703 Build 15063.632
Version 61.0.3163.100 (Official Build) (64-bit)
Intel HD 4600 - Intel Driver: 20.19.15.4624

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	Render Issue 2.png 7.0 KB View Download

Rob, the initial report is from Mac, but I'm wondering if this is related to the clear bugs you've been looking at.

From the symptoms it seems like it could be a duplicate of  crbug.com/769760 .

I haven't been able to repro it locally however.

Apropos #8, could someone who can repro the issue see if it is fixed in the 63.0.3231.0 (or above) Canary?

Hi there, sorry I forgot to mention on the original post.
I'm seeing the same issue on Version 63.0.3236.0 (Official Build) canary (64-bit) as well.

Thank you for providing more feedback. Adding requester "vamshi.kommuri@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

robertphillips@, has the fix for the opacity issues made it into Canary yet? I'm having a hard time keeping track of it.

That canary from #10 (63.0.3236.0) includes the fixes for both the clearing issues ( crbug.com/755871  &  crbug.com/768134 ) and for one of the deferred proxy issues ( crbug.com/769760 ). It doesn't include the fix for the second deferred proxy issue ( crbug.com/769898 ).

Note that, I don't think the fix for the Mac-specific clearing bug (https://skia-review.googlesource.com/c/skia/+/55800) would cover the HW under discussion here (Intel HD 4600 AFAICT).

robertphillips@, assigning to you for now. Please assign back to me if this turns out to be unrelated to the existing Skia issues.

Is it possible that this is due to the second deferred proxy issue you mention? If so, we should likely wait for the next canary and re-confirm that the issue is fixed/not-fixed.

A bit more info:

This also repros (w/ the 63.0.3236.0 canary) on a:

MacBook Pro w/ a HD Graphics 4000 (Ivy Bridge)
MacBook Pro w/ an Iris Graphics 6100 (Broadwell)

It doesn't repro on a MacBook Pro w/ a HD Graphics 630 (Kaby Lake) (w/ 60.0.3112.101).

Replying to #14, it looks like this may be a duplicate of  crbug.com/768134 .

The Mac-specific work-around for that bug (https://skia-review.googlesource.com/55800) was restricted to Intel Iris Pro GPUs but it appears that the problem is more wide-spread.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/7f9b215695aae262797758b2e2a7b1d35fbe584f

commit 7f9b215695aae262797758b2e2a7b1d35fbe584f
Author: Robert Phillips <robertphillips@google.com>
Date: Thu Oct 12 13:42:01 2017

Force all Intel GPUs to use draws instead of clears on Macs

Bug:  773107 
Change-Id: I931d9623a359e264dfee35a2ea6c591cdf83a052
Reviewed-on: https://skia-review.googlesource.com/58580
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

[modify] https://crrev.com/7f9b215695aae262797758b2e2a7b1d35fbe584f/src/gpu/gl/GrGLCaps.cpp

The fix in #18 rolled into Chrome in https://chromium-review.googlesource.com/c/chromium/src/+/719419 at r508840 on 10/13. 

Expanding on #19, this fix has also made it into the 64.0.3241.0 Canary. I have verified that the issue is fixed in that Canary.

Requesting cherry-pick back to M63.

Your change meets the bar and is auto-approved for M63. Please go ahead and merge the CL to branch 3239 manually. Please contact milestone owner if you have questions.
Owners: cmasso@(Android), cmasso@(iOS), gkihumba@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Please merge your change to M63 branch 3239 before 4:00 PM PT so we can take it in for tomorrow's dev release. Thank you.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/5a13102e94e12ff900097e61d53f84029196a104

commit 5a13102e94e12ff900097e61d53f84029196a104
Author: Robert Phillips <robertphillips@google.com>
Date: Tue Oct 17 17:46:46 2017

[M63 cherrypick] Force all Intel GPUs to use draws instead of clears on Macs

No-Tree-Checks: true
No-Try: true
No-Presubmit: true
Bug:  773107 
Change-Id: I8ee0f9c08a8bec68ec76d8d7e42688a411b49f54
Reviewed-on: https://skia-review.googlesource.com/60528
Reviewed-by: Brian Osman <brianosman@google.com>

[modify] https://crrev.com/5a13102e94e12ff900097e61d53f84029196a104/src/gpu/gl/GrGLCaps.cpp

The primary symptoms of this bug have been patched and we have several performance bugs to drive the improvement of the work around so I am closing this issue.