1905272 - Download icon has a blue horizontal line with hardware acceleration enabled (Intel Iris Xe)

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Krzysztof]

Attachment: Download icon with a line

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Steps to reproduce:

During download in Nightly, download icon shows blue horizontal line.

Comment 1

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Hello, thank you for the bug report!
Unfortunately I could not reproduce your issue. Would you be so kind as to answer a few questions so we can investigate this further?

• Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
• Does this issue happen when Firefox is in Troubleshoot Mode? Here’s a link on how to enable it: https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-troubleshoot-mode

Moving the Component to ‘Downloads Panel’. Please change if there’s a better fit, thank you.

Comment 2

[Caspy7]

I can reproduce on Windows 11 in my default profile and a fresh profile.

I cannot reproduce in troubleshooting mode - which is informative, but not the default for users so confirming the bug.

Comment 3

[Marco Bonardo [:mak]]

(In reply to Caspy7 from comment #2)

I cannot reproduce in troubleshooting mode - which is informative, but not the default for users so confirming the bug.

May it's related to hardware acceleration? Could you please check if temporarily disabling acceleration fixes the problem?
Which gpu do you have? Are you on the latest graphics drivers?
How is your Scale and layout set in Windows > Settings > System > Display?
In about:config what's the value of layout.css.dpi?

I am testing on Windows 11 but I cannot reproduce the problem, so far.

Comment 4

[Caspy7]

(In reply to Marco Bonardo [:mak] from comment #3)

Yes, HWA was my assumption.

I disabled it (restarted) and the issue does not occur.

Checked GPU info in about:support and it said:

Description Intel(R) Iris(R) Xe Graphics
Vendor ID 0x8086
Device ID 0x9a49
Driver Version 31.0.101.4887
Driver Date 10-6-2023

Then I went to device manager and said to update the driver and it updated and now reads:

Description Intel(R) Iris(R) Xe Graphics
Vendor ID 0x8086
Device ID 0x9a49
Driver Version 31.0.101.4502
Driver Date 6-15-2023

It appears to have downgraded the driver. I may have gotten the prior driver straight from the manufacturer.
I restarted the browser and the issue still occurs.

layout.css.dpi is set to -1

Comment 5

[Marco Bonardo [:mak]]

Thank you very much. Since the issue doesn't happen with software rendering, I can only assume it's some kind of layout/graphics issue with hardware acceleration. So moving the bug to a more appropriate component.

It would be nice to know if also the OP has an Intel graphics card?
So far I couldn't reproduce on an nvidia card.

Comment 6

[Krzysztof]

I believe that I also have Intel Iris Xe. On a different Intel GPU the issue doesn't occur.

Comment 7

[Krzysztof]

Also layout.css.devPixelsPerPx = 1.5. I've switched to 1.4 and it's OK now.

Comment 8

[Marco Bonardo [:mak]]

I have it set to -1.0 that I think is the default.

Caspy7, do you also have layout.css.devPixelsPerPx set to a custom value?

Comment 9

[Caspy7]

(In reply to Marco Bonardo [:mak] from comment #8)

I have it set to -1.0 that I think is the default.

Caspy7, do you also have layout.css.devPixelsPerPx set to a custom value?

layout.css.devPixelsPerPx is set to -1 for me

Comment 10

[B.J. Herbison]

I didn't see the issue with Linux/XFCE. Switched layout.css.devPixelsPerPx to 1.5 and the glitch appeared when a download was 25% done.