1445621 - Display corruption when viewing through Microsoft RDP

Status: RESOLVED DUPLICATE of bug 1435472

(Firefox :: Untriaged, defect)

Description

[Patrick]

Attachment: gmail_corrupt.JPG

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
Build ID: 20180310025718

Steps to reproduce:

Accessing a Windows 10 PC from another running same OS via Microsoft RDP. It seems to be worst when Firefox is already running when the RDP session is initiated. This has been happening at least from 58.0.1 through 59. Restarting Firefox is 58 seemed to resolve the issue temporarily. In 59 the issue will persist after a restart.


Actual results:

Many sites do not render correctly (see attached screenshot). Gmail seems to be the worst offender, but It sometimes happens to Craigslist and others.


Expected results:

I expect normal page rendering over RDP

Comment 1

[[:philipp]]

hi, the problem may be somewhat related to bug 1435472 - when i switched off cleartype font rendering, sometimes gmail looked similar to what your screenshot shows.

Comment 2

[Dmitry]

You could try workaround:
Go into "Preferences", disable "Performance: Use recommended performance settings", then disable "Use hardware acceleration when available", and switch "Content process limit" to 1. Restart Firefox. It works for me.

Comment 3

[Patrick]

I(In reply to [:philipp] from comment #1)
> hi, the problem may be somewhat related to bug 1435472 - when i switched off
> cleartype font rendering, sometimes gmail looked similar to what your
> screenshot shows.

It does appear to be the same issue. Toggling ClearType in Windows fixes the issue, as does setting gfx.direct2d.disabled to "True"