16.04: Graphical login/desktop vanished?

Ralf Mardorf silver.bullet at zoho.com
Mon Jul 25 18:18:06 UTC 2016


On Mon, 25 Jul 2016 15:59:06 +0200, Josef Wolf wrote:
>On Mon, Jul 25, 2016 at 02:05:22PM +0100, Colin Law wrote:
>> Josef, are you sure you did a clean install of 16.04, not an upgrade
>> or something?  
>Absolutely. I always do clean installs, formatting the partitions.

Hi,

that's strange. I run do-release-upgrade from 15.10 to 16.04. On my
install it's the same as for Colin's install, IOW
it's /lib/systemd/system/lightdm.service. 16.04 still seems to be a
hybrid, since at least rtirq is /etc/init.d/rtirq. However, lightdm
needs to run and rtirq just set up one time the rt priorities and then
doesn't run anymore, so that rtirq exited is correct, but if lightdm
exits, it isn't.

I've got those packages installed:

[root at moonstudio weremouse]# dpkg -l lightdm* | grep ii
ii  lightdm             1.18.2-0ubuntu1 amd64        Display Manager
ii  lightdm-gtk-greeter 2.0.1-2ubuntu4  amd64        simple display manager (GTK+ greeter)

Consider to purge the lightdm package that you've got installed and
after that to reinstall those packages.

Regards,
Ralf

[root at moonstudio weremouse]# lsb_release -rc
Release:	16.04
Codename:	xenial
[root at moonstudio weremouse]# systemctl status lightdm
● lightdm.service - Light Display Manager
   Loaded: loaded (/lib/systemd/system/lightdm.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2016-07-25 20:01:43 CEST; 1min 26s ago
     Docs: man:lightdm(1)
  Process: 2250 ExecStartPre=/bin/sh -c [ "$(basename $(cat /etc/X11/default-display-manager 2>/dev/null))" = "lightdm" ] (cod
 Main PID: 2257 (lightdm)
   [snip]
[root at moonstudio weremouse]# systemctl status rtirq 
● rtirq.service - LSB: Realtime IRQ thread tunning.
   Loaded: loaded (/etc/init.d/rtirq; bad; vendor preset: enabled)
   Active: active (exited) since Mon 2016-07-25 20:01:42 CEST; 2min 6s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2160 ExecStart=/etc/init.d/rtirq start (code=exited, status=0/SUCCESS)

Jul 25 20:01:41 moonstudio systemd[1]: Starting LSB: Realtime IRQ thread tunning....
Jul 25 20:01:42 moonstudio rtirq[2160]: Setting IRQ priorities: start [snd_hdsp] irq=18 pid=1482 prio=90: OK.
Jul 25 20:01:42 moonstudio systemd[1]: Started LSB: Realtime IRQ thread tunning..
[root at moonstudio weremouse]# /etc/init.d/rtirq status

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND	
 1482 FF      90   - 130  0.0 S    irq/18-snd_hdsp	
   28 FF      50   -  90  0.0 S    irq/9-acpi	
   80 FF      50   -  90  0.0 S    irq/19-ehci_hcd	
   81 FF      50   -  90  0.0 S    irq/16-ohci_hcd	
   82 FF      50   -  90  0.0 S    irq/17-ohci_hcd	
   83 FF      50   -  90  0.0 S    irq/18-ohci_hcd	
   84 FF      50   -  90  0.0 S    irq/17-ohci_hcd	
   86 FF      50   -  90  0.0 S    irq/18-ohci_hcd	
   87 FF      50   -  90  0.0 S    irq/1-i8042	
   88 FF      50   -  90  0.0 S    irq/8-rtc0	
  189 FF      50   -  90  0.2 S    irq/22-0000:00:	
  273 FF      50   -  90  0.0 S    irq/14-pata_ati	
  275 FF      50   -  90  0.0 S    irq/15-pata_ati	
  302 FF      50   -  90  0.0 S    irq/22-firewire	
  320 FF      50   -  90  0.0 S    irq/27-radeon	
 1262 FF      50   -  90  0.0 S    irq/7-parport0	
 2060 FF      50   -  90  0.0 S    irq/26-enp3s0	
    3 TS       -   0  19  0.1 S    ksoftirqd/0	
   14 TS       -   0  19  0.1 S    ksoftirqd/1




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