Thanks Terry, Peter, & Tim.
I really hadn't thought of a network device having a web page. My
printer certainly does have a few and that gave me a lot of confidence.
It was much better than peering at the LED window on the printer armed
with a torch and magnifying glass!
I confirmed that I had set up the printer with a fixed IP address, but
then realised I had not done the same on the router. But even after
fixing that the router's web page(!) showed the printer as an attached
device only sporadically.
I ran the .deb file again and this time removed the driver, and then
re-installed it. Now it ... was different - no device found. Actually,
I felt better about that rather than "Invalid argument".
At that point I had THE obvious thought - is there a new driver? Lo and
behold, on the Brother website is a packaged set of drivers for printer,
CUPS, and scanner - dated 21/8/2021!
After installing the new drivers for the 2nd time (this time following
the instructions) it all worked.
I did like to read that other people come across the situation that it
can't have ever worked, even though it did earlier.
My own thought on that is that there were some Ubuntu updates happening
after the first successful scan that changed something in the
libraries. I authorise almost all suggested updates without really
registering it. I've looked in /var/log/apt/history.log and found
libsystemd0, linux-libc-dev, and libgs9 listed at about the right time.
Having done some scanning now I can warn of a problem with xsane that
seems to be well-known but unresolved. At high resolutions (e.g. 4800
dpi) you get "Out of memory" errors. My best guess is that this refers
to the scanner and just needs a better message.
Thanks,
John
On 15/01/2022 12:00, dorset-requ...@mailman.lug.org.uk wrote:
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Today's Topics:
1. Scanning did work and half-hour later didn't? (JD)
2. Re: Scanning did work and half-hour later didn't? (Terry Coles)
3. Re: Scanning did work and half-hour later didn't? (PeterMerchant)
4. Re: Scanning did work and half-hour later didn't? (Tim)
----------------------------------------------------------------------
Message: 1
Date: Fri, 14 Jan 2022 15:24:31 +0000
From: JD <john.dub...@hotmail.co.uk>
To: dorset@mailman.lug.org.uk
Subject: [Dorset] Scanning did work and half-hour later didn't?
Message-ID:
<pa4pr10mb434937419af0a65989219937a2...@pa4pr10mb4349.eurprd10.prod.outlook.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I have a Brother laser printer - DCP1612W.? Yesterday I scanned a couple
of photos and saved them as jpg's.? About a half-hour later I got only
an error message each time I ran xsane, and that is still the case.?
Printing continues to work as normal.
Details:
Ubuntu 20.04.3
The error message is: "Failed to open device 'brother4:net;dev0':
Invalid argument."
It's configured to connect via WLAN.? The IP address appears in the
router list occasionally but usually not.
After: scanimage -L
I get "device `brother4:net1;dev0' is a Brother *DCP1610W DCP1612W", so
the correct model is known about.
In /etc/sane.d/dll.conf I've put in "192.168.0.1/24" but I can't restart
saned: "saned.service is masked."
When I run the Brother file "brscan4-0.4.10-1.amd64.deb" I find it is
already installed, of course.
On the internet I found reference to the file:
http://www.sane-project.org/sane-backends.html";, this contains? 2
supported Brothers but not mine.
In desperation I pressed the SCAN button on the printer, but no
miracles, just "Check connection".
What did I do in the fateful 30 mins yesterday afternoon!?
Regards,
John
------------------------------
Message: 2
Date: Fri, 14 Jan 2022 15:38:29 +0000
From: Terry Coles <d-...@hadrian-way.co.uk>
To: dorset@mailman.lug.org.uk
Subject: Re: [Dorset] Scanning did work and half-hour later didn't?
Message-ID: <4369572.3SBJN2GhQE@optiplex>
Content-Type: text/plain; charset="us-ascii"
John,
One or two thoughts which may or may not be helpful.
On Friday, 14 January 2022 15:24:31 GMT JD wrote:
I have a Brother laser printer - DCP1612W. Yesterday I scanned a couple
of photos and saved them as jpg's. About a half-hour later I got only
an error message each time I ran xsane, and that is still the case.
Printing continues to work as normal.
Caveat: I've never used any kind of Brother Device; I've always bought HP.
Details:
Ubuntu 20.04.3
The error message is: "Failed to open device 'brother4:net;dev0':
Invalid argument."
No thoughts on this.
It's configured to connect via WLAN. The IP address appears in the
router list occasionally but usually not.
For various reasons, I've always configured utility devices on my home network
with a static IP Address. On my HP, I can then browse to it's Home Page to
check its status. Does you Brother have a web page?
After: scanimage -L
I get "device `brother4:net1;dev0' is a Brother *DCP1610W DCP1612W", so
the correct model is known about.
What did I do in the fateful 30 mins yesterday afternoon!?
I have no idea really, but since it is not always visible in your Router
settings, I would suspect that the WiFi connection isn't all it could be.
--
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