Using gentoo-sources-5.7* I noticed a strange behavior with one of my USB audio adapters, specifically the one integrated into my Dell WD19TB Thunderbolt dock (HWIDS 0bda:402e). More close monitoring with the audio player revealed it was not exactly broken, but sound was played at a fraction of its normal speed, making the device essentially unusable. My other USB audio device, a Jabra headset seemed unaffected by the problem, as well as the system's built-in Intel HDA soundcard. I went on to bisect the stable kernel repository from git.kernel.org after confirming the problem was absent in sys-kernel/gentoo-sources-5.7.4. Bisecting ended at commit d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 with precisely this commit causing the issue, confirmed by reverting that commit on the 5.7.7 tag, which fixed the problem for the latest stable release of the linux kernel. Reproducible: Always Steps to Reproduce: 1. Boot affected kernel (>=sys-kernel/*-sources-5.7.6) 2. Try to play back audio via WD19TB Actual Results: Sound being very very slow, accompanied by very slow forward ticking on the audio player's time indicator. Expected Results: Normal sound (and normal time ticking) as with any other sound card. I guess this actually needs to be fixed upstream, but at this time I don't know how to properly report it there. # emerge --info Portage 2.3.99 (python 3.7.8-final-0, default/linux/amd64/17.1/desktop/plasma, gcc-9.3.0, glibc-2.30-r8, 5.7.7-00001-ga78c677369fa x86_64) ================================================================= System uname: Linux-5.7.7-00001-ga78c677369fa-x86_64-Intel-R-_Core-TM-_i7-7600U_CPU_@_2.80GHz-with-gentoo-2.6 KiB Mem: 32819472 total, 27246448 free KiB Swap: 33554428 total, 33554428 free Timestamp of repository gentoo: Mon, 06 Jul 2020 00:45:01 +0000 Head commit of repository gentoo: 9fe6e13796400f151b88172df22a7b588806ba22 Head commit of repository qownnotes-overlay: ffa7390b91cd293a2d37985e0921c74fffe4f74f sh bash 5.0_p17 ld GNU ld (Gentoo 2.33.1 p2) 2.33.1 distcc 3.3.3 x86_64-pc-linux-gnu [enabled] app-shells/bash: 5.0_p17::gentoo dev-java/java-config: 2.3.1::gentoo dev-lang/perl: 5.30.3::gentoo dev-lang/python: 2.7.18::gentoo, 3.7.8-r1::gentoo, 3.8.3-r1::gentoo dev-util/cmake: 3.16.5::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.6-r1::gentoo sys-apps/openrc: 0.42.1::gentoo sys-apps/sandbox: 2.18::gentoo sys-devel/autoconf: 2.13-r1::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.11.6-r3::gentoo, 1.16.1-r1::gentoo sys-devel/binutils: 2.33.1-r1::gentoo sys-devel/gcc: 9.3.0::gentoo sys-devel/gcc-config: 2.3::gentoo sys-devel/libtool: 2.4.6-r6::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 5.4-r1::gentoo (virtual/os-headers) sys-libs/glibc: 2.30-r8::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://server.office.pc-tiede.de/gentoo-portage priority: -1000 sync-rsync-verify-jobs: 1 sync-rsync-verify-metamanifest: yes sync-rsync-verify-max-age: 24 sync-rsync-extra-opts: --ignore-errors local location: /usr/local/portage masters: gentoo priority: 0 qownnotes-overlay location: /usr/local/overlays/qownnotes sync-type: git sync-uri: https://github.com/pbek/qownnotes-overlay.git masters: gentoo kde location: /var/lib/layman/kde sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/kde.git masters: gentoo priority: 50 palemoon location: /var/lib/layman/palemoon sync-type: laymansync sync-uri: https://github.com/deu/palemoon-overlay.git masters: gentoo priority: 50 Installed sets: @kdevelop ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="@FREE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -maes -mavx -mcx16 -mfxsr -mpclmul -mpopcnt -msahf -msse -msse2 -msse3 -msse4 -msse4.1 -msse4.2 -mssse3 -mxsave -mxsaveopt -O2 -pipe -fomit-frame-pointer -fforce-addr -ftracer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/fax /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/maven-bin-3.6/conf /var/spool/fax/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -maes -mavx -mcx16 -mfxsr -mpclmul -mpopcnt -msahf -msse -msse2 -msse3 -msse4 -msse4.1 -msse4.2 -mssse3 -mxsave -mxsaveopt -O2 -pipe -fomit-frame-pointer -fforce-addr -ftracer" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--quiet-build=y --with-bdeps=y --keep-going" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs config-protect-if-modified distcc distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/ http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/ http://ftp.halifax.rwth-aachen.de/gentoo/" LANG="de_DE.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="de en en_US" MAKEOPTS="-j13 -l3" PKGDIR="/var/tmp/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_EXTRA_OPTS="--ignore-errors" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="X Xaw3d a52 aac aalib acl acpi activities alsa amd64 avx avx2 blake2 bluetooth branding bzip2 c++0x c++11 cairo caps cdda cdr cli crypt cups cxx dbus declarative dga dri dts dvd dvdr elogind emboss encode evdev exif fbcon ffmpeg flac gif glamor gmp gpm gstreamer htmlhandbook http2 iconv icu imlib ipv6 jpeg kde kipi kms kwallet latex lcms ldap libnotify libtirpc live lzma mad marble markdown mikmod mmx mng mp3 mp4 mpeg multilib ncurses nls nptl ogg opengl openmp opus pam pango pcap pcre pdf pgo phonon plasma png policykit ppds pulseaudio qml qt5 quicktime readline sdl seccomp semantic-desktop share spell split-usr sse sse2 sse3 sse4_1 ssl ssse3 startup-notification svg tcpd theora threads tiff truetype udev udisks unicode upower usb v4l vidstab vim-syntax vorbis wacom widgets x264 xattr xcb xcomposite xinerama xml xprint xrandr xscreensaver xv xvid zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="hda-intel" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="braindump flow gemini karbon kexi krita plan stage tables sheets words" CAMERAS="canon ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64 pc" INPUT_DEVICES="evdev libinput synaptics wacom" KERNEL="linux" L10N="de de-1901 en en-US" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer nlpsolver pdfimport" LLVM_TARGETS="BPF NVPTX X86" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_7" PYTHON_TARGETS="python3_7" RUBY_TARGETS="ruby26" SANE_BACKENDS="dell1600n_net net" USERLAND="GNU" VIDEO_CARDS="intel i965" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS
Hi, sounds like this is now reverted in 5.7.8 see https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8
(In reply to josef.95 from comment #1) > Hi, sounds like this is now reverted in 5.7.8 > see https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8 From both Changelog as well as the commit mentioned in the Changelog I do agree, it is "fixed" in 5.7.8, at least the change in question is what my "fix" does.
