edited revert firmware page in teh docs

achrn

I had cause to roll back my firmware from 3.4-b6 to 3.3.0, and the instructions at https://duet3d.dozuki.com/Wiki/Getting_Started_With_Duet_3?revisionid=HEAD#Section_Software_Installation failed badly at the step 7:

pi@delta:~ $ sudo apt install -y --allow-downgrades duetsoftwareframework/stable duetcontrolserver/stable duetwebserver/stable duettools/stable duetruntime/stable duetwebcontrol/stable
Reading package lists... Done
Building dependency tree
Reading state information... Done
Selected version '3.3.0' (stable [armhf]) for 'duetsoftwareframework'
Selected version '3.3.0' (stable [armhf]) for 'duetpluginservice' because of 'duetsoftwareframework'
Selected version '3.3.0' (stable [armhf]) for 'duetcontrolserver'
Selected version '3.3.0' (stable [armhf]) for 'duetwebserver'
Selected version '3.3.0' (stable [armhf]) for 'duettools'
Selected version '3.3.0' (stable [armhf]) for 'duetruntime'
Selected version '3.3.0' (stable [all]) for 'duetwebcontrol'
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 duetpluginservice : Depends: duetcontrolserver (= 3.4-b6) but 3.3.0 is to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
pi@delta:~ $ sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following package was automatically installed and is no longer required:
  duetruntime
Use 'sudo apt autoremove' to remove it.
The following packages will be REMOVED:
  duetcontrolserver duetpluginservice duetsd duetsoftwareframework duettools duetwebcontrol duetwebserver
  reprapfirmware
0 upgraded, 0 newly installed, 8 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n]
(Reading database ... 88329 files and directories currently installed.)
Removing duetpluginservice (3.4-b6) ...
Removing duetwebserver (3.4-b6) ...
Removing reprapfirmware (3.3.0-1) ...
Removing duetsd (1.1.0) ...
Removing duetwebcontrol (3.4-b6) ...
dpkg: warning: while removing duetwebcontrol, directory '/opt/dsf/dwc/js' not empty so not removed
Removing duetcontrolserver (3.4-b6) ...
To delete "gpio" group run as root: groupdel gpio
Removing duetsoftwareframework (3.4-b6) ...
To delete the "dsf" user run as root: userdel --force dsf
Removing duettools (3.4-b6) ...

I then tried some flailing around:

pi@delta:~ $ sudo apt install duetsoftwareframework
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 duetsoftwareframework : Depends: duetcontrolserver (= 3.3.0) but it is not going to be installed
                         Depends: duettools (= 3.3.0) but it is not going to be installed
                         Depends: duetwebserver (= 3.3.0) but it is not going to be installed
                         Depends: reprapfirmware (>= 3.3.0-1) but it is not going to be installed
                         Depends: reprapfirmware (<= 3.3.0-999) but it is not going to be installed
                         Recommends: duetpluginservice (= 3.3.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
pi@delta:~ $ sudo apt install duetwebcontrol
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 duetwebcontrol : Depends: duetsoftwareframework (>= 3.2.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

It seems to me the first step of the instructions was wrong to say "only if reverting to v3.2", and you need that step also if reverting from 3.4-b6 to 3.3. So I've deleted the statement on dozuki.

If I re-revert to 3.4-b6 and then re-re-revert following the instructions but do remove duetpluginservice as step 1, it goes OK.

However, I'm somewhat ignorant here - copying out instructions without much knowledge about what I'm doing - so someone who understands it might want to review what I've done to the documentation.

jay_s_uk

@achrn this should downgrade you back to 3.3.0

sudo apt install \
    duetsoftwareframework=3.3.0 \
    duetcontrolserver=3.3.0 \
    duetruntime=3.3.0 \
    duetsd=1.1.0 \
    duettools=3.3.0 \
    duetwebcontrol=3.3.0 \
    duetwebserver=3.3.0 \
    reprapfirmware=3.3.0-1 \
    --allow-downgrades```

chrishamm

@achrn Thanks for pointing it out, I've updated the docs again and removed the first step in favour of downgrading DPS via the last step along with the other packages.

achrn

@chrishamm OK.

It occurs to me that I might have added DPS manually, in which case the previous would not have affected someone that had not. However, presumably apt will take care of it if it's not installed.