1856135 - black dot corruption in page rendering

Status: UNCONFIRMED

(Core :: Graphics, defect)

Description

[Alexis Murzeau]

Attachment: firefox_black_dots_corruption.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/118.0

Steps to reproduce:

On Debian Unstable with X11 and the official Mozilla Firefox release (not the packaged one):

• Open https://ftp-master.debian.org/backports-new.html
• Scroll a bit and/or resize the webpage window size
• Black dots/box appears in the middle of the page

-- Additional System Information about dependencies version (I'm NOT using Debian packaged Firefox):
Debian Release: trixie/sid
APT prefers unstable
APT policy: (950, 'unstable'), (500, 'unstable-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.5.0-1-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox depends on:
ii debianutils 5.12
ii fontconfig 2.14.2-6
ii libasound2 1.2.9-2
ii libatk1.0-0 2.49.91-2
ii libc6 2.37-10
ii libcairo-gobject2 1.17.8-3
ii libcairo2 1.17.8-3
ii libdbus-1-3 1.14.10-1
ii libdbus-glib-1-2 0.112-3
ii libevent-2.1-7 2.1.12-stable-8
ii libffi8 3.4.4-1
ii libfontconfig1 2.14.2-6
ii libfreetype6 2.13.2+dfsg-1
ii libgcc-s1 13.2.0-4
ii libgdk-pixbuf-2.0-0 2.42.10+dfsg-1+b1
ii libglib2.0-0 2.78.0-1
ii libgtk-3-0 3.24.38-5
ii libnspr4 2:4.35-1.1
ii libnss3 2:3.92-1
ii libpango-1.0-0 1.51.0+ds-2
ii libstdc++6 13.2.0-4
ii libvpx7 1.12.0-1
ii libx11-6 2:1.8.6-1
ii libx11-xcb1 2:1.8.6-1
ii libxcb-shm0 1.15-1
ii libxcb1 1.15-1
ii libxcomposite1 1:0.4.5-1
ii libxdamage1 1:1.1.6-1
ii libxext6 2:1.3.4-1+b1
ii libxfixes3 1:6.0.0-2
ii libxrandr2 2:1.5.2-2+b1
ii libxtst6 2:1.2.3-1.1
ii procps 2:4.0.3-1
ii zlib1g 1:1.2.13.dfsg-3

Versions of packages firefox recommends:
ii libavcodec60 7:6.0-6

Versions of packages firefox suggests:
pn fonts-lmodern <none>
pn fonts-stix | otf-stix <none>
ii libcanberra0 0.30-10
ii libgssapi-krb5-2 1.20.1-4
pn pulseaudio <none>

Actual results:

Black dots/boxes appear in the web page and look like graphical corruption.
See screenshot in attachment.

The position of the black dots change everytime the web page window is resized.

The issue also appear on other pages, the "black dots" are sometimes of another colour, probably related to other part of the page.

Expected results:

No black dots should appear.

Comment 1

[Alexis Murzeau]

Attachment: firefox_about_support.txt

What I get is very similar to https://bugzilla.mozilla.org/show_bug.cgi?id=913419 but it was in 2014.
I also have Intel GPU.

Comment 2

[Alexis Murzeau]

Attachment: simplescreenrecorder-2023-09-30_11.59.32.mp4

Note that the black dots doesn't move or disappear when scrolling, they are part of the page.

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: Text' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 4

[Jonathan Kew [:jfkthame]]

Looks to me more likely to be some kind of graphics-driver-level issue than a text-related bug.

Comment 5

[Glenn Watson [:gw]]

It does look like a graphics driver bug to me, looks like a relatively old GPU too. Could you try enabling the gfx.webrender.software value in about:config, restart the browser and report if it still occurs?