accidentally unplugged pc. Now I get an error

I tripped over an extension lead that was feeding my LinuxCNC computer, unplugging it.  After re-booting, when I try to launch my desktop shortcut, I get this error.  (I tried to upload the error report, but the forum software wouldn't allow it)

Background info; I've spent the morning trying to install the drivers for a PCI parallel card.  I couldn't find the drivers anywhere, but suddenly the parallel port started working.  NFI.
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Error report created by /usr/lib/tcltk/linuxcnc/show_errors.tcl:

Print file information:
RUN_IN_PLACE=no
LINUXCNC_DIR=
LINUXCNC_BIN_DIR=/usr/bin
LINUXCNC_TCL_DIR=/usr/lib/tcltk/linuxcnc
LINUXCNC_SCRIPT_DIR=
LINUXCNC_RTLIB_DIR=/usr/realtime-4.19.195-rtai-amd64/modules/linuxcnc
LINUXCNC_CONFIG_DIR=
LINUXCNC_LANG_DIR=/usr/lib/tcltk/linuxcnc/msgs
INIVAR=inivar
HALCMD=halcmd
LINUXCNC_EMCSH=/usr/bin/wish8.6
LINUXCNC - 2.8.2
Machine configuration directory is '/home/muz/linuxcnc/configs/QueenOx'
Machine configuration file is 'QueenOx.ini'
INIFILE=/home/muz/linuxcnc/configs/QueenOx/QueenOx.ini
VERSION=1.1
PARAMETER_FILE=linuxcnc.var
TASK=milltask
HALUI=halui
DISPLAY=gmoccapy
COORDINATES=X Y Z
KINEMATICS=trivkins coordinates=XYZ
Starting LinuxCNC...
Starting LinuxCNC server program: linuxcncsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting LinuxCNC IO program: io
Starting HAL User Interface program: halui
Found file(REL): ./QueenOx.hal
Shutting down and cleaning up LinuxCNC...
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments

Debug file information:
insmod: ERROR: could not insert module /usr/realtime-4.19.195-rtai-amd64/modules/linuxcnc/hal_parport.ko: Unknown symbol in module
./QueenOx.hal:6: exit value: 1
./QueenOx.hal:6: insmod for hal_parport failed, returned -1
See the output of 'dmesg' for more information.
1366
Stopping realtime threads
Unloading hal components

Kernel message information:
[  311.106015] I-pipe: head domain RTAI registered.
[  311.106016] RTAI[hal]: mounted. ISOL_CPUS_MASK: 0.
[  311.106018] SYSINFO - # CPUs: 8, TIMER NAME: 'lapic-deadline', TIMER IRQ: 4355, TIMER FREQ: 424048632, CLOCK NAME: 'tsc', CLOCK FREQ: 3392285000, CPU FREQ: 3392285000, LINUX TIMER IRQ: 4355.
[  311.108520] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
[  311.108552] kstacks pool size = 524288 bytes
[  311.108552] RTAI[sched]: hard timer type/freq = lapic-deadline/424048632(Hz)
[  311.108553] linear timed lists.
[  311.108554] RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 3392285000 hz.
[  311.108554] RTAI[sched]: timer setup = 105 ns, resched latency = 0 ns.
[  311.110538] USERMODE CHECK: OK.
[  311.110539] USERMODE CHECK PROVIDED (ns): KernelLatency 1471, UserLatency 2035.
[  311.110540] FINAL CALIBRATION SUMMARY (ns): KernelLatency 1471, UserLatency 2035.
[  311.115844] RTAI[math]: loaded, using musl libm.
[  311.152335] hal_parport: Unknown symbol parport_register_device (err -2)
[  311.152343] hal_parport: Unknown symbol parport_release (err -2)
[  311.152347] hal_parport: Unknown symbol parport_claim (err -2)
[  311.152351] hal_parport: Unknown symbol parport_unregister_device (err -2)
[  311.152355] hal_parport: Unknown symbol parport_find_number (err -2)
[  311.152361] hal_parport: Unknown symbol parport_find_base (err -2)
[  311.152365] hal_parport: Unknown symbol parport_put_port (err -2)
[  313.464509] RTAI[math]: unloaded.
[  313.527149] SCHED releases registered named ALIEN PEDV$D
[  313.531290] RTAI[malloc]: unloaded.
[  313.639127] RTAI[sched]: unloaded (forced hard/soft/hard transitions: traps 0, syscalls 0).
[  313.656522] I-pipe: head domain RTAI unregistered.
[  313.656527] RTAI[hal]: unmounted.

---

Info report created by linuxcnc_info:
The file:    /tmp/linuxcnc_info.txt
can be posted to a forum or a web site like:
     pastebin.com
in order to provide information about the linuxcnc
system and configuration.

                Date: Mon 25 Apr 14:38:20 AEST 2022
            UTC Date: Mon 25 Apr 04:38:20 UTC 2022
        this program: /usr/bin/linuxcnc_info
              uptime: 14:38:20 up 5 min, 1 user, load average: 0.01, 0.14, 0.08
     lsb_release -sa: Debian Debian GNU/Linux 10 (buster) 10 buster
      which linuxcnc: /usr/bin/linuxcnc
                 pwd: /home/muz/linuxcnc/configs/QueenOx
                USER: muz
             LOGNAME: muz
                HOME: /home/muz
              EDITOR:
              VISUAL:
            LANGUAGE: en_AU:en
                TERM: dumb
           COLORTERM:
             DISPLAY: :0.0
             DESKTOP: lightdm-xsession
        display size: 1680x1050 pixels (444x277 millimeters)
                PATH: /usr/bin:/home/muz/linuxcnc/configs/QueenOx/bin:/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

uname items:
         nodename -n: LinuxCNC
      kernel-name -s: Linux
      kernel-vers -v: #5 SMP PREEMPT Sun Jul 11 19:13:27 BST 2021
          machine -m: x86_64
        processor -p: unknown
         platform -i: unknown
      oper system -o: GNU/Linux

/proc items:
             cmdline: BOOT_IMAGE=/boot/vmlinuz-4.19.195-rtai-amd64 root=UUID=1ef30892-0829-49ce-b8ee-42cc2871217b ro initrd=/install/gtk/initrd.gz quiet
          model name: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
               cores: 4
             cpu MHz: 1991.286
             parport:
              serial: 0000-0000 : serial

Versions:
                 gcc: gcc (Debian 8.3.0-6) 8.3.0
              python: Python 2.7.16
                 git: not_in_PATH
          git commit: NA
                 tcl: 8.6
                  tk: 8.6
               glade: not_in_PATH
          glade-gtk2: not_in_PATH

linuxcnc_var all:

     LINUXCNCVERSION: 2.8.2
LINUXCNC_AUX_GLADEVCP: /usr/share/linuxcnc/aux_gladevcp
LINUXCNC_AUX_EXAMPLES: /usr/share/linuxcnc/aux_examples
            REALTIME: /etc/init.d/realtime
                 RTS: /usr/realtime-4.19.195-rtai-amd64/bin/rtai-config
          HALLIB_DIR: /usr/share/linuxcnc/hallib

dpkg -l '*linuxcnc*':
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                Version               Architecture Description
+++-===================-=====================-============-=====================================================================
ii  linuxcnc            1:2.8.2               amd64        motion controller for CNC machines and robots
ii  linuxcnc-dbgsym     1:2.8.2               amd64        debug symbols for linuxcnc
ii  linuxcnc-dev        1:2.8.2               amd64        PC based motion controller for real-time Linux
un  linuxcnc-doc        <none>                <none>       (no description available)
ii  linuxcnc-doc-en     1:2.8.2.11.g6a3d0a434 all          motion controller for CNC machines and robots (English documentation)
un  linuxcnc-sim        <none>                <none>       (no description available)
un  linuxcnc-sim-dev    <none>                <none>       (no description available)
rc  linuxcnc-uspace     1:2.8.2.11.g6a3d0a434 amd64        motion controller for CNC machines and robots
un  linuxcnc-uspace-dev <none>                <none>       (no description available)

 

What it would appear is you are trying load linuxcnc-uspace with an RTAI kernel.
Uspace needs RT_PREEMPT kernel. Do you have both installed on your system ?

This is the give away to a kernel issue:
insmod: ERROR: could not insert module /usr/realtime-4.19.195-rtai-amd64/modules/linuxcnc/hal_parport.ko: Unknown symbol in module

It is the rtai version. I had it running before unplugging.  I'm using rtai because I'm connected to a parallel port.
 

When I try to start LinuxCNC in 2.7.15, I get a similar error, but the error report is much longer. 
 

For an RTAI kernel you need a RTAI version of Linuxcnc not the Uspace version.

Generally uspace versions work well with the parallel port.

Looking at what you have installed you have both a sim version the a uspace version installed. You should really have one or the other and for a "real" system just the uspace version.

Having a look at the buildbot there doesn't appear to be any recent RTAI packages available.

But that doesn't explain why it was working before the incident?

The last rtai version is 2.8.2 Buster, which is what I have installed.

Did you see the error report I posted above from 2.7.15? That was also working before I unplugged it.

Has it maybe got something to do with the PCI parallel card?

FYI, (maybe it's irrelevant) I have both 2.8.2 Buster (rtai), 2.7.15 Wheezy and Windoze 7 all on different HDDs on the same 'poota.
 

The 2.7.15 issue is different.
Error: could not insert module /usr/realtime-3.4-9-rtai-686-pae/modules/linuxcnc/hal_parport.ko: No such device

Which I suspect is that kernel not supporting you PCI card.

Ok I'm well confused and ignore some of what I said before I had a rough night after watching to MotoGP, I can not for the life of me find any 2.8.2 RTAI packages or ISO for that case.

How exactly did you get rtai installed ?

linuxcnc.org/docs/html/getting-started/updating-linuxcnc.html

this is what i get with lspci -v in 2.7.15, which is the one which I was able to actually use and create chips.

I was in the process of setting up a workable 2.8.2 config when I pulled the plug.  I think my priority is to get 2.7.15 up and running again so I can still make some stuff...
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muz@LinuxCNC:~$ lspci -v
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller (rev 09)
Subsystem: Dell Device 053a
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: agpgart-intel

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device 053a
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f7800000 (64-bit, non-prefetchable)
=4M%Memory at e0000000 (64-bit, prefetchable)
=256M%I/O ports at f000
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915

00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) (prog-if 30 [XHCI])
Subsystem: Dell Device 053a
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7c20000 (64-bit, non-prefetchable)
=64K%Capabilities: <access denied>
Kernel driver in use: xhci_hcd

00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Dell Device 053a
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at f7c3c000 (64-bit, non-prefetchable)
Capabilities: <access denied>

00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
Subsystem: Dell Device 053a
Flags: bus master, fast devsel, latency 0, IRQ 20
Memory at f7c00000 (32-bit, non-prefetchable)
=128K%Memory at f7c39000 (32-bit, non-prefetchable)
=4K%I/O ports at f080
Capabilities: <access denied>
Kernel driver in use: e1000e

00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI])
Subsystem: Dell Device 053a
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7c38000 (32-bit, non-prefetchable)
=1K%Capabilities: <access denied>
Kernel driver in use: ehci_hcd

00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
Subsystem: Dell Device 053a
Flags: bus master, fast devsel, latency 0, IRQ 22
Memory at f7c30000 (64-bit, non-prefetchable)
=16K%Capabilities: <access denied>
Kernel driver in use: snd_hda_intel

00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI])
Subsystem: Dell Device 053a
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7c37000 (32-bit, non-prefetchable)
=1K%Capabilities: <access denied>
Kernel driver in use: ehci_hcd

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a4) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 00002000-00002fff
Memory behind bridge: dfb00000-dfbfffff
Capabilities: <access denied>

00:1f.0 ISA bridge: Intel Corporation C216 Series Chipset LPC Controller (rev 04)
Subsystem: Dell Device 053a
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>

00:1f.2 RAID bus controller: Intel Corporation 82801 SATA Controller [RAID mode] (rev 04)
Subsystem: Dell Device 053a
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19
I/O ports at f0d0
I/O ports at f0c0
I/O ports at f0b0
I/O ports at f0a0
I/O ports at f060
Memory at f7c36000 (32-bit, non-prefetchable)
=2K%Capabilities: <access denied>
Kernel driver in use: ahci

00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
Subsystem: Dell Device 053a
Flags: medium devsel, IRQ 18
Memory at f7c35000 (64-bit, non-prefetchable)
I/O ports at f040

01:02.0 Parallel controller: Device 1710:9865 (prog-if 03 [IEEE1284])
Subsystem: Smart Link Ltd. Device 2000
Flags: medium devsel, IRQ 255
I/O ports at 2000 [disabled]
I/O ports at 2008 [disabled]
Memory at dfb00000 (32-bit, non-prefetchable) [disabled]
=4K%Memory at dfb01000 (32-bit, non-prefetchable) [disabled]
=4K%Capabilities: <access denied>

muz@LinuxCNC:~$