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BenoitDuffez / AndroidCupsPrint

Port of cups4j to Android. Allows wireless printing from any Android device to any CUPS-enabled print server or network printer.
https://benoitduffez.github.io/AndroidCupsPrint
GNU Lesser General Public License v3.0
228 stars 66 forks source link

CUPS printer becomes unavailable #182

Open pentastich opened 3 years ago

pentastich commented 3 years ago

Hi! I'm experimenting with Android CUPS Print on my Google Pixel 4 XL phone. It's running Android 11.

After some messing around, I was able to get the app to discover my printer and I can print to it (so I must have SSL set up). However, the next time I go to print, I initially get the preview and print button. Then, after a second or two, the screen switches to "This printer isn't available right now" and I see a small popup saying "Search found 1 printer".

If I open the select printer dialogue, and select "All Printers…", then select my printer, I get the preview and blue printer icon, and can, in fact, print.

One other, possibly unrelated, issue is that although my printer can print duplex, and CUPS knows that it can print duplex, and Avahi Discover appears to think it can print duplex, the "Two-sided" option is greyed out.

In case it helps, here's what "Avahi Discovery" reports for my printer:

Service Type: _ipp._tcp Service Name: Office Printer @ nasty Domain Name: local Interface: enp36s0 IPv4 Address: nasty.local/192.168.86.238:631 TXT TLS = 1.2 TXT priority = 0 TXT URF = DM3 TXT note = Office TXT rp = printers/Office TXT printer-type = 0x105E TXT ty = EPSON WorkForce 645, driverless, cups-filters 1.27.4 TXT Duplex = T TXT qtotal = 1 TXT Copies = T TXT product = (EPSON WorkForce 645) TXT printer-state = 3 TXT pdl = application/octet-stream,application/pdf,application/postscript,image/jpeg,image/png,image/pwg-raster,image/urf TXT Color = T TXT adminurl = https://nasty.local.:631/printers/Office TXT txtvers = 1 TXT UUID = 6b053119-918b-3453-6c37-22dc10e48886

My CUPS server is hosted on a device running Ubuntu Server 20.04.1.

If there's any other info that would be helpful, please let me know. This is a home system and I can try all sorts of things.

Thanks!

Jim

fungs commented 3 years ago

Also here (Android 7) I cannot select duplex printing and if the printer is not in status 'not connected' it prevents me from printing.

Usually from other clients, I print to the cups server and later turn on the printer which then prints everything in the queue. This doesn't work with this Android client.