Both 5.8.0-50 and 5.8.0-25 have the fix of https://bugzilla.kernel.org/show_bug.cgi?id=208807, if -50 doesn't work while -25 works, I guess that the other patches impact this issue.
>From the -25 to -50, there are 7 new patches added to the fs/nfsd/, you could >revert them one by one to test: hwang4@hwang4-ThinkPad-X1-Nano-Gen-1:~/work/mainline/groovy/ubuntu-groovy$ git log --pretty=oneline Ubuntu-5.8.0-25.26..Ubuntu-5.8.0-50.56 fs/nfsd/. a048839aadd1b0a9b7594a47e006161c7b5d1b65 nfsd4: readdirplus shouldn't return parent of export 71f8261ed2ab3d9f89798873c789314def659aa2 NFSD: Fix 5 seconds delay when doing inter server copy 1e2b415540e9a0f47880ed4d10725ab23be9c4f1 nfsd: Fix message level for normal termination 9e5fc966b92ee496bececd6aeaeaf39cc7a48d8d NFSD: fix missing refcount in nfsd4_copy by nfsd4_do_async_copy f5ed4ba307483eb3188efa37a04825c31afdf70e NFSD: Fix use-after-free warning when doing inter-server copy 44c672e9a6cdfff14d9074e4814f1e350cc2a541 NFSD: Add missing NFSv2 .pc_func methods 920960bb5e07ac4e21316ff141fd0e76f6faf2a8 nfsd: rename delegation related tracepoints to make them less confusing ** Bug watch added: Linux Kernel Bug Tracker #208807 https://bugzilla.kernel.org/show_bug.cgi?id=208807 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1924829 Title: NFS clients cannot open some files Status in linux package in Ubuntu: Confirmed Bug description: Playing videos from a NFS share using Kodi degraded drastically after some kernel upgrade on the NFS server using Ubuntu 20.10. Some videos don't open at all, some get stuck and pixelated. Tested using: Clients: Kodi on RPi4 and Kodi on Windows 10. Server kernels: 5.18.0-50 (not working) and 5.18.0-25 (working) Possibly related to: https://bugzilla.kernel.org/show_bug.cgi?id=208807 --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D1', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: skip CurrentDmesg: Error: command ['pkexec', 'dmesg'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie Error executing command as another user: Not authorized This incident has been reported. DistroRelease: Ubuntu 20.10 HibernationDevice: RESUME=UUID=1a513959-16cd-4cdc-8382-5a8c5572854f InstallationDate: Installed on 2016-08-06 (1714 days ago) InstallationMedia: It MachineType: FUJITSU LifeBook A6120 Package: linux (not installed) PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-50-generic root=UUID=1fc5433c-2a50-4587-82c0-76097194fe6b ro video=SVIDEO-1:d ProcVersionSignature: Ubuntu 5.8.0-50.56-generic 5.8.18 RelatedPackageVersions: linux-restricted-modules-5.8.0-50-generic N/A linux-backports-modules-5.8.0-50-generic N/A linux-firmware 1.190.3 RfKill: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no Tags: groovy Uname: Linux 5.8.0-50-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker libvirt lpadmin plugdev sambashare sudo wireshark _MarkForUpload: True acpidump: Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie Error executing command as another user: Not authorized This incident has been reported. dmi.bios.date: 05/19/2008 dmi.bios.release: 1.8 dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd. dmi.bios.version: Version 1.08 dmi.board.name: FJNB1E4 dmi.board.vendor: FUJITSU dmi.chassis.type: 10 dmi.chassis.vendor: A6EHF1EA09885000 dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.08:bd05/19/2008:br1.8:svnFUJITSU:pnLifeBookA6120:pvr:rvnFUJITSU:rnFJNB1E4:rvr:cvnA6EHF1EA09885000:ct10:cvr: dmi.product.name: LifeBook A6120 dmi.sys.vendor: FUJITSU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924829/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
