backchannel error

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RalfG
Posts: 2
Joined: Mon Mar 06, 2017 9:43 pm

backchannel error

Post by RalfG »

My Canon MX725 "prints" only blank sheets and it results into the error "failed to read backchannel data: Operation now in progress." According to a similiar topic I replaced the original bjnp file by turboprints version, but it resulted into the same error, too. Do you have any further hints?
zedonet
Site Admin
Posts: 2154
Joined: Fri Oct 06, 2006 8:02 am

Re: backchannel error

Post by zedonet »

Hello,

if the printer only ejects blank pages, the wrong printer driver might be selected.

Please check the following

- your version of TurboPrint (TurboPrint Control -> dialog "About / License")?
- your version of bjnp -Terminal window, command
/usr/lib/cups/backend/bjnp -v
- is the correct driver "Canon_PIXMA_MX720series" selected (TurboPrint Control -> right column "driver")?
- does the printer print when you attach it via USB?
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