Upgrade from 14.04.2 (latest updated trusty) to 16.4.1 is not smooth

[sylwester]

I'm using nvidia drivers, but the very same version as under Trusty so it hasn't changed.

I am having a very sluggish machine after upgrading from 14.4 to 16.4.1. It's slow logging in, it's slow switcing user and even login from terminal takes a while before I get prompt.
It was never like this before so I'm wondering if there are some sort of daemon for user maintance or something that is causing this.

Sometimes the list of users doesn't appear or takes a long time until it appears.

I sometimes need to press Altgr + SysRq + K to kill X and it's children and this has stopped working. Now I enter screensaver and second tmie around I'm still logged in but have made the X tty useless. Sometimes everything hangs and I need to press hard reset. Usually "Altgr + SysRq + K" was the general solution i told my wife to do when she had problems with her system and now using that trick seems to make everything worse.

My .xsession-errors has this after login:

openConnection: connect: Fila eller mappa finnes ikke <-- norwegian for file or directory doesn't exist
cannot connect to brltty at :0


After upgrades, when compiz has been involved, I have had to remove .cache/compizconfig-1/ or else my system will not show any menues or indicators at all. This has happened twice since I got Xenial.

Neither dmesg, syslog doesn't have any interesting lines. DIsk utility doesn't indicate there are any problems with the disks.

Hope you got any ideas on how to debug or even a possible workaround/solution. Right now I feel my machine is near unusable.

Btw: The graphical upgrade was sort of a nightmare too since I lost all possibilities to click on dialogs since I couldn't give them focus and had to kill X and resume from terminal.
This happened to all three machines so I'm now not willing to try it again but go terminal-only next time. I though such things were fixed by .1-releases. I feel bad for the people who don't like to use CLI.

[mörgæs]

Let's see the hardware. Please run
sudo lshw -sanitize > lshw.txt and post lshw.txt in CODE tags.

[sylwester]

I think I have managed to fix the delay in user switch/login/logout considerably by turing off dnsmasq in /etc/NetworkManager/NetworkManager.conf (just commenting it out)
I know DNS i crucial for a system to work and it might seem like dnsmasq doesn't work as planned or is prone to die perhaps?
I guess the unusable factor was that the resolver waited for dnsmasq and after a timeout turned to the second in line for each lookup and that somehow happened before loginscreen shows up and during shell initialization/pam?

I made the hardware output anyway in case you have some additional ideas other things I can do/or perhaps try to figure out whats happening with compiz:


computer
description: Desktop Computer
product: GA-990FXA-UD3
vendor: Gigabyte Technology Co., Ltd.
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 vsyscall32
configuration: boot=normal chassis=desktop uuid=[REMOVED]
*-core
description: Motherboard
product: GA-990FXA-UD3
vendor: Gigabyte Technology Co., Ltd.
physical id: 0
version: x.x
*-firmware
description: BIOS
vendor: Award Software International, Inc.
physical id: 0
version: FD
date: 05/30/2012
size: 128KiB
capacity: 4032KiB
capabilities: isa pci pnp upgrade shadowing cdboot bootselect socketedrom edd int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: AMD FX(tm)-8120 Eight-Core Processor
vendor: Advanced Micro Devices [AMD]
physical id: 4
bus info: cpu@0
version: AMD FX(tm)-8120 Eight-Core Processor
slot: Socket M2
size: 1400MHz
capacity: 3200MHz
width: 64 bits
clock: 200MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 nodeid_msr topoext perfctr_core perfctr_nb cpb hw_pstate vmmcall arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold cpufreq
*-cache:0
description: L1 cache
physical id: a
slot: Internal Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back
configuration: level=1
*-cache:1
description: L3 cache
physical id: c
slot: External Cache
size: 2MiB
capacity: 2MiB
capabilities: synchronous internal write-back
configuration: level=3
*-cache
description: L1 cache
physical id: b
slot: Internal Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back
configuration: level=1
*-memory
description: System Memory
physical id: 29
slot: System board or motherboard
size: 16GiB
*-bank:0
description: DIMM 1333 MHz (0,8 ns) [empty]
physical id: 0
slot: A0
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:1
description: DIMM 1333 MHz (0,8 ns) [empty]
physical id: 1
slot: A1
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:2
description: DIMM 1333 MHz (0,8 ns)
physical id: 2
slot: A2
size: 8GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:3
description: DIMM 1333 MHz (0,8 ns)
physical id: 3
slot: A3
size: 8GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-pci:0
description: Host bridge
product: RD890 PCI to PCI bridge (external gfx0 port B)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 100
bus info: pci@0000:00:00.0
version: 02
width: 64 bits
clock: 33MHz
*-pci:0
description: PCI bridge
product: RD890 PCI to PCI bridge (PCI express gpp port B)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 2
bus info: pci@0000:00:02.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:18 ioport:e000(size=4096) memory:f8000000-fbffffff ioport:d0000000(size=268435456)
*-display
description: VGA compatible controller
product: GF114 [GeForce GTX 560 Ti]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:27 memory:f8000000-f9ffffff memory:d0000000-d7ffffff memory:dc000000-dfffffff ioport:ef00(size=128) memory:fa000000-fa07ffff
*-multimedia
description: Audio device
product: GF114 HDMI Audio Controller
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:19 memory:fbffc000-fbffffff
*-pci:1
description: PCI bridge
product: RD890 PCI to PCI bridge (PCI express gpp port H)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 9
bus info: pci@0000:00:09.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:d000(size=4096) memory:fd100000-fd1fffff ioport:fde00000(size=1048576)
*-usb
description: USB controller
product: EJ168 USB 3.0 Host Controller
vendor: Etron Technology, Inc.
physical id: 0
bus info: pci@0000:02:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:24 memory:fd1f8000-fd1fffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.4.0-36-generic xhci-hcd
physical id: 0
bus info: usb@9
logical name: usb9
version: 4.04
capabilities: usb-3.00
configuration: driver=hub slots=2 speed=5000Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.4.0-36-generic xhci-hcd
physical id: 1
bus info: usb@8
logical name: usb8
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-usb:0
description: Mouse
product: USB Optical Mouse
vendor: A4Tech
physical id: 1
bus info: usb@8:1
version: 0.01
capabilities: usb-1.10
configuration: driver=usbhid maxpower=100mA speed=1Mbit/s
*-usb:1
description: Keyboard
product: Mad Catz V.5 Keyboard
vendor: Madcatz
physical id: 2
bus info: usb@8:2
version: 1.37
capabilities: usb-2.00
configuration: driver=usbhid maxpower=100mA speed=1Mbit/s
*-pci:2
description: PCI bridge
product: RD890 PCI to PCI bridge (external gfx1 port A)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: a
bus info: pci@0000:00:0a.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:18 ioport:c000(size=4096) memory:fdb00000-fdbfffff ioport:fd200000(size=1048576)
*-storage
description: SATA controller
product: JMB363 SATA/IDE Controller
vendor: JMicron Technology Corp.
physical id: 0
bus info: pci@0000:03:00.0
version: 10
width: 32 bits
clock: 33MHz
capabilities: storage pm pciexpress ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:18 memory:fdbff000-fdbff1ff
*-ide
description: IDE interface
product: JMB368 IDE controller
vendor: JMicron Technology Corp.
physical id: 0.1
bus info: pci@0000:03:00.1
version: 10
width: 32 bits
clock: 33MHz
capabilities: ide pm pciexpress bus_master cap_list
configuration: driver=pata_jmicron latency=0
resources: irq:19 ioport:cf00(size=8) ioport:ce00(size=4) ioport:cd00(size=8) ioport:cc00(size=4) ioport:cb00(size=16)
*-storage
description: SATA controller
product: SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 11
bus info: pci@0000:00:11.0
version: 40
width: 32 bits
clock: 66MHz
capabilities: storage ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=32
resources: irq:19 ioport:ff00(size=8) ioport:fe00(size=4) ioport:fd00(size=8) ioport:fc00(size=4) ioport:fb00(size=16) memory:fdfff000-fdfff3ff
*-usb:0
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 12
bus info: pci@0000:00:12.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:fdffe000-fdffefff
*-usbhost
product: OHCI PCI host controller
vendor: Linux 4.4.0-36-generic ohci_hcd
physical id: 1
bus info: usb@4
logical name: usb4
version: 4.04
capabilities: usb-1.10
configuration: driver=hub slots=5 speed=12Mbit/s
*-usb:1
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 12.2
bus info: pci@0000:00:12.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=32
resources: irq:17 memory:fdffd000-fdffd0ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.4.0-36-generic ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=5 speed=480Mbit/s
*-usb:2
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 13
bus info: pci@0000:00:13.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:fdffc000-fdffcfff
*-usbhost
product: OHCI PCI host controller
vendor: Linux 4.4.0-36-generic ohci_hcd
physical id: 1
bus info: usb@5
logical name: usb5
version: 4.04
capabilities: usb-1.10
configuration: driver=hub slots=5 speed=12Mbit/s
*-usb:3
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 13.2
bus info: pci@0000:00:13.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=32
resources: irq:17 memory:fdffb000-fdffb0ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.4.0-36-generic ehci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=5 speed=480Mbit/s
*-serial UNCLAIMED
description: SMBus
product: SBx00 SMBus Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14
bus info: pci@0000:00:14.0
version: 42
width: 32 bits
clock: 66MHz
configuration: latency=0
*-ide
description: IDE interface
product: SB7x0/SB8x0/SB9x0 IDE Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.1
bus info: pci@0000:00:14.1
version: 40
width: 32 bits
clock: 66MHz
capabilities: ide bus_master
configuration: driver=pata_atiixp latency=32
resources: irq:17 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:fa00(size=16)
*-multimedia
description: Audio device
product: SBx00 Azalia (Intel HDA)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.2
bus info: pci@0000:00:14.2
version: 40
width: 64 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=snd_hda_intel latency=32
resources: irq:16 memory:fdff4000-fdff7fff
*-isa
description: ISA bridge
product: SB7x0/SB8x0/SB9x0 LPC host controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.3
bus info: pci@0000:00:14.3
version: 40
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:3
description: PCI bridge
product: SBx00 PCI to PCI Bridge
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.4
bus info: pci@0000:00:14.4
version: 40
width: 32 bits
clock: 66MHz
capabilities: pci subtractive_decode bus_master vga_palette
resources: ioport:b000(size=4096) memory:fdd00000-fddfffff memory:fdc00000-fdcfffff
*-firewire
description: FireWire (IEEE 1394)
product: VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller
vendor: VIA Technologies, Inc.
physical id: e
bus info: pci@0000:04:0e.0
version: c0
width: 32 bits
clock: 33MHz
capabilities: pm ohci bus_master cap_list
configuration: driver=firewire_ohci latency=32 maxlatency=32
resources: irq:22 memory:fddff000-fddff7ff ioport:bf00(size=128)
*-usb:4
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 14.5
bus info: pci@0000:00:14.5
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:fdffa000-fdffafff
*-usbhost
product: OHCI PCI host controller
vendor: Linux 4.4.0-36-generic ohci_hcd
physical id: 1
bus info: usb@6
logical name: usb6
version: 4.04
capabilities: usb-1.10
configuration: driver=hub slots=2 speed=12Mbit/s
*-pci:4
description: PCI bridge
product: SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 15
bus info: pci@0000:00:15.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:a000(size=4096) memory:fda00000-fdafffff ioport:fd900000(size=1048576)
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:05:00.0
logical name: eth0
version: 06
serial: [REMOVED]
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=[REMOVED] latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:26 ioport:ae00(size=256) memory:fd9ff000-fd9fffff memory:fd9f8000-fd9fbfff
*-pci:5
description: PCI bridge
product: SB700/SB800/SB900 PCI to PCI bridge (PCIE port 1)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 15.1
bus info: pci@0000:00:15.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:9000(size=4096) memory:fd800000-fd8fffff ioport:fd700000(size=1048576)
*-usb
description: USB controller
product: EJ168 USB 3.0 Host Controller
vendor: Etron Technology, Inc.
physical id: 0
bus info: pci@0000:06:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:25 memory:fd8f8000-fd8fffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.4.0-36-generic xhci-hcd
physical id: 0
bus info: usb@11
logical name: usb11
version: 4.04
capabilities: usb-3.00
configuration: driver=hub slots=2 speed=5000Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.4.0-36-generic xhci-hcd
physical id: 1
bus info: usb@10
logical name: usb10
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-pci:6
description: PCI bridge
product: SB900 PCI to PCI bridge (PCIE port 2)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 15.2
bus info: pci@0000:00:15.2
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:8000(size=4096) memory:fd600000-fd6fffff ioport:fd500000(size=1048576)
*-pci:7
description: PCI bridge
product: SB900 PCI to PCI bridge (PCIE port 3)
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 15.3
bus info: pci@0000:00:15.3
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 ioport:7000(size=4096) memory:fd400000-fd4fffff ioport:fd300000(size=1048576)
*-usb:5
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 16
bus info: pci@0000:00:16.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci-pci latency=32
resources: irq:18 memory:fdff9000-fdff9fff
*-usbhost
product: OHCI PCI host controller
vendor: Linux 4.4.0-36-generic ohci_hcd
physical id: 1
bus info: usb@7
logical name: usb7
version: 4.04
capabilities: usb-1.10
configuration: driver=hub slots=4 speed=12Mbit/s
*-usb:6
description: USB controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 16.2
bus info: pci@0000:00:16.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=32
resources: irq:17 memory:fdff8000-fdff80ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.4.0-36-generic ehci_hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=4 speed=480Mbit/s
*-pci:1
description: Host bridge
product: Family 15h Processor Function 0
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 101
bus info: pci@0000:00:18.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Family 15h Processor Function 1
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 102
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Family 15h Processor Function 2
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 103
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Family 15h Processor Function 3
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 104
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k10temp
resources: irq:0
*-pci:5
description: Host bridge
product: Family 15h Processor Function 4
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 105
bus info: pci@0000:00:18.4
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=fam15h_power
resources: irq:0
*-pci:6
description: Host bridge
product: Family 15h Processor Function 5
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 106
bus info: pci@0000:00:18.5
version: 00
width: 32 bits
clock: 33MHz
*-scsi:0
physical id: 1
logical name: scsi2
capabilities: emulated
*-cdrom
description: DVD-RAM writer
product: BW-12B1ST
vendor: ASUS
physical id: 0.1.0
bus info: scsi@2:0.1.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: 1.03
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-scsi:1
physical id: 2
logical name: scsi5
capabilities: emulated
*-disk
description: ATA Disk
product: OCZ-AGILITY3
physical id: 0.0.0
bus info: scsi@5:0.0.0
logical name: /dev/sda
version: 2.22
serial: [REMOVED]
size: 55GiB (60GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=00054d0a
*-volume
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@5:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: [REMOVED]
size: 55GiB
capacity: 55GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2012-09-01 03:59:01 filesystem=ext4 lastmountpoint=/ modified=2016-09-18 08:44:25 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2016-09-18 08:44:26 state=mounted
*-scsi:2
physical id: 3
logical name: scsi6
capabilities: emulated
*-disk
description: ATA Disk
product: WDC WD30EZRX-00D
physical id: 0.0.0
bus info: scsi@6:0.0.0
logical name: /dev/sdb
version: 0A80
serial: [REMOVED]
size: 2794GiB
capacity: 2794GiB
capabilities: lvm2
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096
*-scsi:3
physical id: 5
logical name: scsi7
capabilities: emulated
*-disk
description: ATA Disk
product: WDC WD30EZRX-00D
physical id: 0.0.0
bus info: scsi@7:0.0.0
logical name: /dev/sdc
version: 0A80
serial: [REMOVED]
size: 2794GiB
capacity: 2794GiB
capabilities: lvm2
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096

[mörgæs]

There is certainly no hardware bottleneck.
My guess is that the upgrade itself is to blame and I suggest a fresh install of 16.04.1.

[Bucky Ball]

May have spotted your issue from the title without reading the rest of the thread (but I did read it). You upgraded from 14.04.2. 14.04 is at the .5 point release and you should have been, too, before you upgraded. You needed to be at 14.04.5, update/upgrade that, then do the upgrade to 16.04 LTS.

Doesn't help now and not guaranteeing this was the cause (leaving third-party PPAs and drivers, particularly video, enabled can be problematic and not advised) but just mentioning, perhaps for future reference.

IMHO probable cause would be your release wasn't up to date before you tried to upgrade it to a newer one or you've left a PPA or driver enabled during the install and are now feeling the consequences. Unfortunately, upgrade problems caused by these things don't often end well but wishing you luck in getting it sorted. :)

Do you have good back ups?

PS: If you take a look here (https://wiki.ubuntu.com/Releases) you'll find that, rather than being the latest 14.04, 14.04.2 is in fact no longer support and EOL. In other words, you tried to upgrade from an unsupported release. It can get confusing with the HWE stack and point releases.

[Skaperen]

it has been quite fast for me. but, i did a fresh new install of 16.04. i recommend this to others. do make TWO backups before doing this (and check them both) or like me, buying a new machine or new disk space.

[sylwester]

@Bucky Ball
Sorry. The from version must be a type then since I did update all packages and reboot before I started the distribution upgrade. It must have been 14.04.5.

@Skaperen
My desktop computer is from 2012 but was nicely speched with SSD root, 16GB Ram, 8 core CPU and Nvidia 560 (that is better than the generations after since they reduced bus size).
I bought it specifically to run Unity smoothly and perhaps some games :-) since I had to either do that or change distro when Unity2D was discontinued.
Since my, at that time, 6 year old daughter was used to Unity menu I choose not to change the look and feel since she liked the new menu. At almost 11 years old she still prefers Ubuntu.

[Bucky Ball]

@Bucky Ball
Sorry. The from version must be a type then since I did update all packages and reboot before I started the distribution upgrade. It must have been 14.04.5.

Unless you did something like


sudo apt-get update
sudo apt-get dist-upgrade

... to upgrade to the .5 point release, hard to confirm that. Did you?

[sylwester]

Unless you did something like


sudo apt-get update
sudo apt-get dist-upgrade

... to upgrade to the .5 point release, hard to confirm that. Did you?

Yes. I do this before upgrading to a new distribution:



apt-get update
apt-get dist-upgrade
shutdown -r now
# enter CLI again
apt-get autoremove
apt-get clean
shutdown -r now

[sylwester]

I was a little fast when I said I thought it was done. Even after removing dnsmasq and even editing nsswitch.conf to "hosts: hosts: files dns" I still have problems with the userswitch and then it won't come back until I have rebooted.
As mentioned before there is little information in the logs.