Brother HL-1210W; 1200HQ mode about brlaser HOT 7 OPEN

Sorry to bother everyone again, but I think it is fair to notice here that I again had trouble printing a document using my HL-1210W with default settings (600dpi). This time I tried to print a RGB JPEG scan of 300dpi (A4) that I converted to PDF using imagemagick's convert tool. The JPEG had a resolution of 2464x3500 pixels.

Lowering the value of max_lines_per_block_ from 64 further down to 32 did the trick for me. I haven't tested whether this might impact other prints, so YMMV. I do not have enough insight into the workings of the transmission scheme to the printer to know whether setting even just a value of 1 here would cause the printer to fail processing on other occasions; but if that is not the case, I suggest changing it to a really safe value like that as I think it is better to have a slowly printing printer than one that silently drops pages depending on their complexity.

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DCP-1512E here :) Similar problem noticed - 1200HQ mode did not print anything. I've set max_lines_per_block_ = 16, then recompiled and reinstalled driver and 1200HQ works fine :) Thanks for a hint :)

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Thanks! That was a mysterious issue that was reported with many Brother HL-series printers. I'll check with a couple of other reporters and make a new release soon.

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You're welcome. To add some further info: 600dpi seems to work fine on my printer now, but out of curiousity I tried printing once at 1200dpi and it failed for a normal (so moderately complex) document. I suspect that the value might need to be even lower (half?) for that. As I am not really interested in that resolution / mode I didn't do any further investigation but can do that if you want - just drop me a note.

Are the values that are currently in the driver basically reverse-engineering guesses or is there some kind of further reasoning behind them?

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It's mostly guesswork, based on my old DCP-7030. It seems to work well on DCP-series printers, but the HL-series seems to behave just a little different.

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@pdewacht: hello, any ETA on when is this changes going to be pushed in printer-driver-brlaser package? Thanks

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I had this issue on my printer HL-L2340D. This commit fixed the issue for me.

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