Thank you for responding!

Did try it. Results are:
Many failures!
Ign:16 http://ppa.launchpad.net/ubuntu-mate-dev/fresh-mate/ubuntu
focal/main amd64 pluma-common all 1.26.0-0ubuntu1~focal2.0
Err:17 http://ppa.launchpad.net/ubuntu-mate-dev/fresh-mate/ubuntu
focal/main amd64 gir1.2-pluma-1.0 amd64 1.26.0-0ubuntu1~focal2.0
  Cannot initiate the connection to ppa.launchpad.net:80
(2001:67c:1560:8008::19). - connect (101: Network is unreachable) [IP:
91.189.95.85 80]
...
I believe this is the result of security "improvements" to my WiFi
connection that causes repeated disconnections.

Got WiFi working (temporarily) and then got the common errors:
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_gpu_info.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_gpu_info.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_gpu_info.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_toc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_asd.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_ta.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_sos.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_ta.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_asd.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_sos.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_ta.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_asd.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_sos.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/renoir_ta.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_rlc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec2.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_rlc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_mec2.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_mec.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_me.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_pfp.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_ce.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_rlc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_mec2.bin
for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_mec.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_me.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_pfp.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_ce.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_rlc.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec2.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_me.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_pfp.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_ce.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_sdma.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_sdma1.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_sdma.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_sdma.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_sdma.bin
for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes.bin
for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/oland_uvd.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/pitcairn_uvd.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/verde_uvd.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/tahiti_uvd.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_vcn.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_vcn.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_vcn.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_vcn.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_smc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_smc.bin for module
amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_smc.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_dmcu.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vangogh_dmcub.bin for
module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navy_flounder_dmcub.bin
for module amdgpu

I believe this is because the coders assumed I have a CPU and a separate
GPU card. I have an AMD A8-7600 Radeon R7 APU. My next machine will include
a Ryzen R5 5500U APU. Not a gamer. Do not need a high-end GPU (even if I
could afford one).

Engrampa can now open an .epub file!

Again, thank you for responding.

Robert Pearson

On Sat, Oct 16, 2021 at 3:05 AM Norbert <email address hidden> wrote:

> RAR is discussed in different bug-report - bug 1947055 . Please do not
> mix them.
>
> The current EPUB-related bug is fixed upstream for newer Engrampa
> releases. Please read linked bug-report.
> Possible way to fix it on your current Ubuntu MATE 20.04 LTS it to add
> MATE 1.26 PPA to the system by using the following commands:
>
> ```
> sudo add-apt-repository ppa:ubuntu-mate-dev/fresh-mate
> sudo apt update
> sudo apt dist-upgrade
> ```
>
> then reboot and try newer desktop with newer Engrampa.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1947056
>
> Title:
>   engrampa archive manager cannot unzip .epub files
>
> Status in MATE Desktop:
>   Fix Released
> Status in engrampa package in Ubuntu:
>   Incomplete
>
> Bug description:
>   .epub files are zip files - yet the coder for engrampa refuses to open
>   them.
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 20.04
>   Package: engrampa 1.24.0-2
>   ProcVersionSignature: Ubuntu 5.11.0-37.41~20.04.2-generic 5.11.22
>   Uname: Linux 5.11.0-37-generic x86_64
>   ApportVersion: 2.20.11-0ubuntu27.20
>   Architecture: amd64
>   CasperMD5CheckResult: skip
>   CurrentDesktop: MATE
>   Date: Wed Oct 13 18:55:56 2021
>   ExecutablePath: /usr/bin/engrampa
>   ProcEnviron:
>    LANGUAGE=en_US
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>    SHELL=/bin/bash
>   SourcePackage: engrampa
>   UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/mate-desktop/+bug/1947056/+subscriptions
>
>