Feeds are not getting updated after suspend/resume

[ValdikSS]

ОС: Linux Fedora 35
Qt: 5.15.2
QuiteRSS: 0.19.4 (21.04.2020, Qt-5.15.2, SQLite-3.36.0, WebKit-602.1)

QuiteRSS перестаёт обновлять все RSS-ленты, если ноутбук отправить в сон и включить заново. Все фиды помечаются красным крестом «сломанного интернета», а прогресс-бар доходит до 100% очень быстро.

Программа не пытается открыть IPv4/IPv6-сокет (проверено через strace), но периодически открывает netlink-сокеты с флагом NETLINK_ROUTE. Подозреваю, что программа не получает информацию о работоспособности интернета, и думает, что его нет.

[ValdikSS]

Полагаю, это https://bugreports.qt.io/browse/QTBUG-84907
@tieugene

[ValdikSS]

https://bugzilla.redhat.com/show_bug.cgi?id=2041569
@tieugene

[ValdikSS]

Hrm, that's not https://bugreports.qt.io/browse/QTBUG-84907 and not a network availability related.
I've hacked up
mainApp->networkManager()->setNetworkAccessible(QNetworkAccessManager::Accessible);

in

quiterss/src/network/networkmanager.cpp

Line 304 in a672609

QNetworkReply *NetworkManager::createRequest(QNetworkAccessManager::Operation op,

and in

quiterss/src/webview/webpage.cpp

Line 207 in a672609

void WebPage::populateNetworkRequest(QNetworkRequest &request)

and it still doesn't work. The feeds are not getting updated, the pictures and other resources inside the feed records are not getting loaded in the webview.
This seems like a regression of Qt5 in Fedora, since I don't remember such behavior on the previous distro version, Fedora 34.
Fedora syncs Qt5 code with KDE Neon, maybe the regression is there.
@tieugene

[jimgreen2013]

I'm suffering from the same bug, do you have any clues or solutions?

[jimgreen2013]

More info about this issue, error log

27.03.2023 10:44:50.276 WARNING: "Request failed: result = -1, error - The specified configuration cannot be used. (8), url - https://quiterss.org/en/rss.xml"

Maybe this has something to do with QNetworkAccessManager. See similar problems qutebrowser/qutebrowser#129

[ValdikSS]

Probably the same Qt issue in crow-translate
crow-translate/crow-translate#383

[ValdikSS]

Workaround:
Disable "networkbearer" plugin of Qt5
$ sudo mv /usr/lib64/qt5/plugins/bearer /usr/lib64/qt5/plugins/bearer.mv

Thanks to crow-translate/crow-translate#383 (comment)

[ValdikSS]

Nextcloud resets QNetworkAccessManager in case of issues.

https://github.com/nextcloud/desktop/blob/12177878e25a6e8ae350a117880be769d3b3db5/src/gui/accountstate.cpp#L298-L320

https://github.com/nextcloud/desktop/blob/12177878e25a6e8ae350a117880be769d3b3db5e/src/libsync/account.cpp#L363-L384

See nextcloud/desktop#4331

[ValdikSS]

Took some time to debug the issue.
https://bugreports.qt.io/browse/QTBUG-114666

Simpliest workaround: start the affected applications without the network, connect to the network later.