On Mon 01 Oct 2018 at 18:05:31 +0300, Tancredi-Paul Grozav wrote: > Hi, Brian,
Hi, Tancredi-Paul. Don't forget to mail the bug in any reply. I dealt with the last post for you. > Thank you for paying attention to this issue. > > Since I'm running HP Linux Imaging and Printing System (*ver. 3.16.11*) I > downloaded > https://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/hplip-3.16.11-plugin.run > and then ran: > > sh hplip-3.16.11-plugin.run --tar xf > python installPlugin.py > > No errors so far. But i still get the same error when scanning with both > commands: > > hp-scan -d hpaio:/net/HP_LaserJet_M1120n_MFP?ip=192.168.200.16 > scanimage -d hpaio:/net/HP_LaserJet_M1120n_MFP?ip=192.168.200.16 > > image.pnm > > Using the latest hplip plugin (3.18.9) didn't help either. I even tried > to install hplip and hplip-plugin from HP, the latest versions(both > 3.18.9), to avoid debian's repos. I still get the same error. > > libsane-hpaio is installed, and the latest version(in debian's repos). You have a device which works. I have two machines which scan. None of them need a plugin. I am reluctant to see libsane-hpaio or libhpmud0 as being at fault. There is also an absence of bug reports involving the two libraries. Has the m1120n ever scanned reliably? Does a USB connection make any difference? > I saw that that folder you gave me contains a .plugin file: > https://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/hp_laserjet_m1120n_mfp.plugin > that seems to be made for exactly this hp printer. Is there something > special about this scanner device? should I use that file in any way? Probably not; scanning wasn't supported until HPLIP 2.8.9. I suppose it might be worth trying that plugin. https://developers.hp.com/hp-linux-imaging-and-printing/release_notes > I am starting to think that there might be a problem at a lower level. > Every now and then I can receive an image from that scanner, but It's quite > random, maybe 1 out of 100 attempts. I'm not sure, but it might be related > to powering off and on the device from it's button. Is there something we > can do to determine if the problem is on the device itself, or the client > computer? The network cable between them seems to be fine, because I can > access the printer/scanner through it's web interface(and printing works > fine). Also, the device settings did not change in the last few years and I > am getting an image every now and then. The only thing changing is the > software and config on my client computer. That's why I started this thread. The SANE debugging techniques you used are the lowest level techniques I am familiar and comfortable with. The problem does not appear to be a network cable problem. Regards, Brian.
