Bug 199570
| Summary: | [GTK] Blank web view when transitioning between hardware acceleration (composition) modes | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | |
| Component: | WebKitGTK | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | bugs-noreply, cgarcia, mcatanzaro |
| Priority: | P2 | ||
| Version: | WebKit Local Build | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| See Also: | https://bugs.webkit.org/show_bug.cgi?id=199826 | ||
mail
WebKitGTK 2.24.2
I'm working on the WebKitGTK port of Next browser:
https://next.atlas.engineer.
(Mirror: https://github.com/atlas-engineer/next)
When I switch "buffer" (or "tab") between 1 page displaying https://imdb.com and
another displaying https://github.com, the github page is _very often_
blank (not always). If I open a new tab for github, it works.
After a discussion with Michael Catanzaro, we presumed that the issue may lie in
the transition in and out of accelerated composition mode.
Indeed, if I start Next with WEBKIT_FORCE_COMPOSITING_MODE=1, the issue
disappears.
A work around would be to set it to "forced" with
webkit_settings_set_hardware_acceleration_policy(), but what about systems that
do not support hardware acceleration then?
The problem occurs on master (for posterity: commit e13f5b9ecd232aa780b636a0c873fdccc1be6f0d).
Could be related to
https://bugs.webkit.org/show_bug.cgi?id=193224.
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |
Michael Catanzaro
It's not related to bug #193224 because PSON is not enabled in the 2.24 branch.
Carlos Garcia Campos
I can't reproduce it with 2.24.2, but there are a lot more issues with current trunk, it only works with AC disabled.
Carlos Garcia Campos
hmm, I guess I can't reproduce in 2.24 because AC is now forced in next.
Carlos Garcia Campos
I've found the problem in trunk, but I can't reproduce it in trunk even when not forcing AC mode yet.
mail
Indeed, as a workaround I'm forcing AC in Next.
Force-disabling AC works too. Only "auto" triggers the issue.
I'm not sure I understand the last comment: you found the problem, but it works with Next nonetheless? Is there anything I can do to help?
Carlos Garcia Campos
I tried to reproduce the issue in current trunk patching next to not force AC mode, and I couldn't reproduce it. Neither with 2.24.
mail
I'm running Next on Guix, if that can help reproducing the issue.
(Guix can be installed on any GNU/Linux distro.)
Carlos Garcia Campos
Wayland or X11?
mail
X11.