Confirming this is still an issue on 20.04 with $ apt-cache policy kaffeine kaffeine: Installed: 2.0.18-1build1 Candidate: 2.0.18-1build1 Version table: *** 2.0.18-1build1 500 500 http://gb.archive.ubuntu.com/ubuntu focal/universe amd64 Packages The file is a sequence of zlib-encoded bytes created using QT's QFile.qCompress() https://doc.qt.io/qt-5/qbytearray.html#qCompress QByteArray qCompress(const QByteArray &data, int compressionLevel = -1) where compressionLevel = 9 (best). Analyzing the received file shows: $ binwalk /tmp/scantable.dvb.gz DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 4 0x4 Zlib compressed data, best compression The file being requested is: https://autoconfig.kde.org/kaffeine/scantable.dvb.qz src/dvb/dvbconfigdialog.cpp:636: job = KIO::get(QUrl("https://autoconfig.kde.org/kaffeine/scantable.dvb.qz"), KIO::NoReload, Enabling KIO debugging reveals the file is downloaded: kf5.kio.kio_http: ============ Sending Header: kf5.kio.kio_http: "GET /kaffeine/scantable.dvb.qz HTTP/1.1" kf5.kio.kio_http: "Host: autoconfig.kde.org" kf5.kio.kio_http: "Connection: keep-alive" kf5.kio.kio_http: "User-Agent: Mozilla/5.0 (X11; Linux x86_64) KHTML/5.68.0 (like Gecko) Konqueror/5 KIO/5.68" kf5.kio.kio_http: "Accept: text/html, text/*;q=0.9, image/jpeg;q=0.9, image/png;q=0.9, image/*;q=0.9, */*;q=0.8" kf5.kio.kio_http: "Accept-Encoding: gzip, deflate, x-gzip, x-deflate" kf5.kio.kio_http: "Accept-Charset: utf-8,*;q=0.5" kf5.kio.kio_http: "Accept-Language: en-GB,en;q=0.9" kf5.kio.kio_http: sent it! kf5.kio.kio_http: kf5.kio.kio_http: ============ Received Status Response: kf5.kio.kio_http: "HTTP/1.1 200 OK" kf5.kio.kio_http: QUrl("https://autoconfig.kde.org/kaffeine/scantable.dvb.qz") response code: 200 previous response code: 0 kf5.kio.kio_http: wasAuthError= false isAuthError= false sameAuthError= false kf5.kio.kio_http: -- full response: "HTTP/1.1 200 OK\r\nDate: Sun, 15 Aug 2021 07:07:46 GMT\r\nServer: Apache/2.4.29 (Ubuntu)\r\nUpgrade: h2\r\nConnection: Upgrade, Keep-Alive\r\nLa st-Modified: Tue, 04 May 2021 17:52:06 GMT\r\nAccept-Ranges: bytes\r\nContent-Length: 102499\r\nCache-Control: max-age=0\r\nExpires: Sun, 15 Aug 2 021 07:07:46 GMT\r\nStrict-Transport-Security: max-age=15768000\r\nReferrer-Policy: strict-origin-when-cross-origin\r\nX-XSS-Protection: 1; mode=b lock\r\nX-Content-Type-Options: nosniff\r\nX-Frame-Options: sameorigin\r\nPermissions-Policy: interest-cohort=()\r\nKeep-Alive: timeout=5, max=100 " kf5.kio.kio_http: parsed expire date from 'expires' header: "Sun, 15 Aug 2021 07:07:46 GMT" kf5.kio.kio_http: Cache needs validation kf5.kio.kio_http: kf5.kio.kio_http: Previous Response: 0 kf5.kio.kio_http: Current Response: 200 kf5.kio.kio_http: "102499" bytes left. kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 98403 kf5.kio.kio_http: Determining mime-type from content... kf5.kio.kio_http: Mimetype buffer size: 4096 kf5.kio.kio_http: Using default mimetype: "text/html" kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 94307 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 90211 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 86115 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 82019 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 77923 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 73827 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 69731 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 65635 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 61539 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 57443 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 53347 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 49251 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 45155 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 41059 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 36963 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 32867 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 28771 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 24675 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 20579 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 16483 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 12387 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 8291 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 4195 kf5.kio.kio_http: bytesReceived: 4096 m_iSize: 102499 Chunked: false BytesLeft: 99 kf5.kio.kio_http: bytesReceived: 99 m_iSize: 102499 Chunked: false BytesLeft: 0 kf5.kio.kio_http: EOD received! Left = "0" kf5.kio.kio_http: kf5.kio.kio_http: keepAlive = true kf5.kio.kio_http: kf5.kio.kio_http: keep alive ( 5 ) kf5.kio.kio_http: keepAlive = false kf5.kio.kio_http: kf5.kio.kio_http: kdeinit5: PID 2849693 terminated. Based on the update dialog reporting "Scan data update failed" it suggests the code path never reaches: src/dvb/dvbmanager.cpp DvbManager::updateScanData(const QByteArray &data) There's a suspicious looking job kill based on scanData.size() >= 64KiB: src/dvb/dvbconfigdialog.cpp void DvbScanFileDownloadDialog::dataArrived(KIO::Job *, const QByteArray &data) { if ((scanData.size() + data.size()) <= (64 * 1024)) { scanData.append(data); } else { job->kill(KJob::EmitResult); } } Which led me to the upstream source and an April 2021 commit and related bug: https://bugs.kde.org/show_bug.cgi?id=436371 " Can't download scanfile, as it is too big" commit 209a263ab2191f0b1d13f48a0a2fa67794357ad0 Author: Mauro Carvalho Chehab