[Bug 1906418] Re: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets
You are right! With the 5.11 kernel I am now seeing igmp packets over ethernet. Thanks! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Re: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets
Marking this fixed, since the problem does not occur with the current kernel for Ubuntu 20.04. ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] acpidump.txt
apport information ** Attachment added: "acpidump.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440088/+files/acpidump.txt ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] WifiSyslog.txt
apport information ** Attachment added: "WifiSyslog.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440087/+files/WifiSyslog.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] UdevDb.txt
apport information ** Attachment added: "UdevDb.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440086/+files/UdevDb.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] RfKill.txt
apport information ** Attachment added: "RfKill.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440085/+files/RfKill.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] PulseList.txt
apport information ** Attachment added: "PulseList.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440084/+files/PulseList.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] ProcModules.txt
apport information ** Attachment added: "ProcModules.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440083/+files/ProcModules.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] ProcCpuinfoMinimal.txt
apport information ** Attachment added: "ProcCpuinfoMinimal.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440081/+files/ProcCpuinfoMinimal.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] ProcInterrupts.txt
apport information ** Attachment added: "ProcInterrupts.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440082/+files/ProcInterrupts.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] ProcCpuinfo.txt
apport information ** Attachment added: "ProcCpuinfo.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440080/+files/ProcCpuinfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Lsusb-t.txt
apport information ** Attachment added: "Lsusb-t.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440078/+files/Lsusb-t.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Lsusb-v.txt
apport information ** Attachment added: "Lsusb-v.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440079/+files/Lsusb-v.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Lsusb.txt
apport information ** Attachment added: "Lsusb.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440077/+files/Lsusb.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Lspci-vt.txt
apport information ** Attachment added: "Lspci-vt.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440076/+files/Lspci-vt.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Lspci.txt
apport information ** Attachment added: "Lspci.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440075/+files/Lspci.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] IwConfig.txt
apport information ** Attachment added: "IwConfig.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440074/+files/IwConfig.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] CurrentDmesg.txt
apport information ** Attachment added: "CurrentDmesg.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440073/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] CRDA.txt
apport information ** Attachment added: "CRDA.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440072/+files/CRDA.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Re: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets
apport information ** Tags added: apport-collected focal ** Description changed: This is occurring on Ubuntu 20.04 with kernel 5.4.0-56-generic. To demonstrate, run $ sudo tcpdump -nv -ienp4s0 igmp (adjusting the interface name appropriately). The result will be 0 packets captured, even though all other Ubuntu systems on the same ethernet lan are reporting igmp queries from the router and responding with reports every minute or so. One consequence of this is that a CUPS server using the Comet Lake onboard ethernet controller cannot be detected by any clients, except within the first 120 seconds after restarting the avahi-daemon. Since the Comet Lake server does not receive the igmp queries, it does not respond with a report and so the router unsubscribes the interface from the multicast group that is used by avahi and bonjour. This makes the CUPS server disappear. The output of ubuntu-bug linux is attached. + --- + ProblemType: Bug + ApportVersion: 2.20.11-0ubuntu27.13 + Architecture: amd64 + AudioDevicesInUse: + USERPID ACCESS COMMAND + /dev/snd/controlC0: culler 2071 F pulseaudio + CasperMD5CheckResult: skip + CurrentDesktop: ubuntu:GNOME + DistroRelease: Ubuntu 20.04 + InstallationDate: Installed on 2020-11-17 (13 days ago) + InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) + MachineType: Gigabyte Technology Co., Ltd. Z490I AORUS ULTRA + Package: linux (not installed) + ProcEnviron: + TERM=xterm-256color + PATH=(custom, no user) + XDG_RUNTIME_DIR= + LANG=en_US.UTF-8 + SHELL=/bin/bash + ProcFB: 0 i915drmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-56-generic root=UUID=bdba1f28-6903-467f-abfa-10c6bee47cd7 ro quiet splash vt.handoff=7 + ProcVersionSignature: Ubuntu 5.4.0-56.62-generic 5.4.73 + RelatedPackageVersions: + linux-restricted-modules-5.4.0-56-generic N/A + linux-backports-modules-5.4.0-56-generic N/A + linux-firmware1.187.4 + Tags: focal + Uname: Linux 5.4.0-56-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 11/03/2020 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: F6b + dmi.board.asset.tag: Default string + dmi.board.name: Z490I AORUS ULTRA + dmi.board.vendor: Gigabyte Technology Co., Ltd. + dmi.board.version: x.x + dmi.chassis.asset.tag: Default string + dmi.chassis.type: 3 + dmi.chassis.vendor: Default string + dmi.chassis.version: Default string + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF6b:bd11/03/2020:svnGigabyteTechnologyCo.,Ltd.:pnZ490IAORUSULTRA:pvr-CF:rvnGigabyteTechnologyCo.,Ltd.:rnZ490IAORUSULTRA:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring: + dmi.product.family: Z490 MB + dmi.product.name: Z490I AORUS ULTRA + dmi.product.sku: Default string + dmi.product.version: -CF + dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440071/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] Re: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets
The line from dpkg.log reporting installation of this kernel package is: 2020-12-01 06:19:50 status installed linux-image-5.4.0-56-generic:amd64 5.4.0-56.62 ** Package changed: ubuntu => linux (Ubuntu) ** Description changed: This is occurring on Ubuntu 20.04 with kernel 5.4.0-56-generic. To demonstrate, run $ sudo tcpdump -nv -ienp4s0 igmp (adjusting the interface name appropriately). - The result will be 0 packets captured, even though all other Ubuntu systems on the same ethernet - lan are reporting igmp queries from the router and responding with reports every minute or so. + The result will be 0 packets captured, even though all other Ubuntu + systems on the same ethernet lan are reporting igmp queries from the + router and responding with reports every minute or so. - One consequence of this is that a CUPS server using the Comet Lake onboard ethernet controller - cannot be detected by any clients, except within the first 120 seconds after restarting the - avahi-daemon. Since the Comet Lake server does not receive the igmp queries, it does not respond - with a report and so the router unsubscribes the interface from the multicast group that is used - by avahi and bonjour. This makes the CUPS server disappear. + One consequence of this is that a CUPS server using the Comet Lake + onboard ethernet controller cannot be detected by any clients, except + within the first 120 seconds after restarting the avahi-daemon. Since + the Comet Lake server does not receive the igmp queries, it does not + respond with a report and so the router unsubscribes the interface + from the multicast group that is used by avahi and bonjour. This + makes the CUPS server disappear. The output of ubuntu-bug linux is attached. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1906418] [NEW] igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets
Public bug reported: This is occurring on Ubuntu 20.04 with kernel 5.4.0-56-generic. To demonstrate, run $ sudo tcpdump -nv -ienp4s0 igmp (adjusting the interface name appropriately). The result will be 0 packets captured, even though all other Ubuntu systems on the same ethernet lan are reporting igmp queries from the router and responding with reports every minute or so. One consequence of this is that a CUPS server using the Comet Lake onboard ethernet controller cannot be detected by any clients, except within the first 120 seconds after restarting the avahi-daemon. Since the Comet Lake server does not receive the igmp queries, it does not respond with a report and so the router unsubscribes the interface from the multicast group that is used by avahi and bonjour. This makes the CUPS server disappear. The output of ubuntu-bug linux is attached. ** Affects: ubuntu Importance: Undecided Status: New ** Attachment added: "igc.txt" https://bugs.launchpad.net/bugs/1906418/+attachment/5440046/+files/igc.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906418 Title: igc driver for Comet Lake onboard 15f3 NIC drops all igmp packets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1906418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1448164] Re: runit cannot be installed
The problem here is that the runit package assumes that the system is using upstart; it does not work with systemd, which became the default as of 15.04. Another package besides git-all which is affected by this is qmail-run. A workaround is to switch your 15.04 system back to using upstart. This can be done by installing the upstart-sysv package. See https://wiki.ubuntu.com/SystemdForUpstartUsers . Hopefully by the time 15.10 appears the packages which implicitly depend on having upstart running will have been adjusted to work with systemd, and you can switch back to systemd by installing systemd-sysv and ubuntu-standard. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1448164 Title: runit cannot be installed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/runit/+bug/1448164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279987] Re: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {})
This bug can be fixed by changing two lines in the python script /usr/lib/python3/dist-packages/usbcreator/backends/udisks$ diff -u backend.py.orig backend.py. It seems rather important to fix it, since it will prevent people from installing Ubuntu. Also, it is rather off-putting to find a webpage which explains how easy it is to make a bootable USB stick, and then have the easy solution instantly crash. I am attaching a patch which fixed this problem for me. ** Patch added: fs.mount_sync(no_options, None) - fs.call_mount_sync(no_options, None) https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1279987/+attachment/4283625/+files/backend.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279987 Title: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {}) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1279987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1279987] Re: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {})
My apologies for the garbled paste. The python script to be patched is: /usr/lib/python3/dist-packages/usbcreator/backends/udisks/backend.py -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1279987 Title: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {}) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1279987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs