I posted an earlier version of this on the Apple Support forums but have not had much in the way of response. I figure there are a lot of smart people here, so here goes.
On November 27th I disassembled my desk setup, including my Epson Perfection V370 Photo scanner, and assembled my brand new desk. Since putting everything back I cannot reliably scan anything using VueScan or Epson Scan 2. Whichever I use, I can never get more than a handful of scans done before either the scan gets stuck at the calibration stage or the software crashes.
I feel like I have tried everything. I have:
- tried different USB cables
- tried different USB ports in different hubs and directly on the M1 MacBook Pro
- turned off various equipment including USB hubs
- updated/reinstalled software and drivers
- downloaded and run an ‘El Capitan patch’ Epson put out some years ago for similar problems
- bought a new Epson Perfection V600 Photo scanner and repeated all of the above
- moved the scanner to different locations on the desk
Once I got the V600 I’ve not gone back and tested the V370 again.
I thought that patch had sorted it because I managed to scan three frames of film without it failing (previously I had never managed more than one), but the very next attempt hung on calibrating the first frame.
Note that prior to replacing my desk I probably had not done any scanning for a month or two, but up to that time the V370 had worked FLAWLESSLY for more than a year. I did have similar sorts of problems some years ago but do not remember how they were resolved. It may have been a noisy USB hub, but I had tested the V370 and V600 with exactly the same equipment powered up that saw the V370 working perfectly and still the problem persists.
Here’s the thing, though. I did a session with Apple’s Image Capture app a week or so ago and managed to scan a dozen documents no problem. Today I did over two dozen document scans with Image Capture. Also no problems.
Image Capture uses the “ICA Driver” (I figured out ICA = Image Capture App) which I installed from Epson’s site. I recall when I first got my M1 MacBook Pro in November 2020 I had problems with the (V370) scanner not being recognised and discovered I needed to install both the ICA Driver and the Epson Scan 2 software (which is described on the Epson site as “Scanner Scan 2 Driver”.
VueScan says I need the ICA driver, which implies that’s what it uses:
But VueScan repeatedly hangs and when I contacted their support, I got a bunch of things to try (all tried) and then “Well it works for a lot of other people with the same scanner model”. And I believe them.
So where I am at now is this: I figure there has to be something that is interfering with the scanning process, possibly at the USB level. The earlier problem, for which I think that patch applied, (and as I recall it) was related to the scanner sending events to the computer and the software was missing them. The patch sought to ensure the messages were not missed. Somehow.
I tried even booting in Safe Mode one time and using Epson Scan 2 and still encountered the problems, so if it is something interfering, it must be something pretty low level.
Tonight I thought I’d open Activity Monitor and see what jumped out at me to try killing off, but there are 595 processes running and I just feel overwhelmed by the thought of randomly trying stuff, particularly because it’s not quick to see it fail, and I have been led to believe it was working before, only to be let down many minutes of scanning later.
So, hive mind of MPU, your suggestions please:
- What types of process should I be looking at?
- What other things might make a difference that I haven’t tired?
I emailed Epson support and after the “try plugging it directly into the computer” response I went back with a detailed rundown of most of the above and got a reply saying “call this number”. I don’t hold much hope that will help.