Public bug reported: Running I/O heavy operation (cp) inside terminal in X server session will lock up entire system while running it in a TTY works fine.
I am filing this as a kernel bug because the following steps will still hang the system: 1. Open up gnome-terminal 2. Start copying a really large file between two different EXT4 partitions on my local SSD with a "cp" command 3. Switch to a TTY 4. Login to TTY and observe htop or iotop Expected result: I can see the operation happen and after a while it completes Actual result: Keyboard drops out some time during operation (TTY stops responding, caps lock light no longer responds to pressing caps lock, computer appears effectively dead with last screen image frozen) When I run the "cp" operation on the TTY to start with, no matter if the X session is running in parallel or not, it works as expected with no trouble. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-generic 4.10.0.19.21 ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8 Uname: Linux 4.10.0-19-generic x86_64 ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: jonas 2297 F...m pulseaudio /dev/snd/controlC0: jonas 2297 F.... pulseaudio CurrentDesktop: GNOME Date: Thu Apr 13 13:04:03 2017 InstallationDate: Installed on 2017-04-08 (4 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 138a:0090 Validity Sensors, Inc. Bus 001 Device 003: ID 13d3:5248 IMC Networks Bus 001 Device 005: ID 056a:5047 Wacom Co., Ltd Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 20FDCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-19-generic.efi.signed root=/dev/mapper/fedora-root ro rootdelay=5 quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-19-generic N/A linux-backports-modules-4.10.0-19-generic N/A linux-firmware 1.164 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-04-12 (1 days ago) dmi.bios.date: 11/16/2015 dmi.bios.vendor: LENOVO dmi.bios.version: N1GET35W (1.12 ) dmi.board.asset.tag: Not Available dmi.board.name: 20FDCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40700 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1GET35W(1.12):bd11/16/2015:svnLENOVO:pn20FDCTO1WW:pvrThinkPadYoga260:rvnLENOVO:rn20FDCTO1WW:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20FDCTO1WW dmi.product.version: ThinkPad Yoga 260 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1682402 Title: Running I/O heavy operation (cp) inside terminal in X server session will lock up entire system while running it in a TTY works fine To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682402/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs