How to switch HP printer from CDROM mode to Printer/Scanner mode

printingsaneusb

I have an HP multifunction printer/scanner M1123 MFP. I installed the latest hplip that should support it and also hp-plugin. However, when I plug the device in, I only see a CDROM detected in dmesg. lsusb only shows "Hewlett Packard" without anything else.

This is one of those devices that shows up as a CDROM and then auto-installs the driver on Windows.

Is there some command to make it switch from CDROM/USB memory more to "Printer/scanner" mode? xsane reports that it fails to find any device.

Best Answer

If your system has proper kernel modules loaded, it should be enough to run eject /dev/sr0 (assuming /dev/sr0 is the printer's virtual cdrom device - see dmesg to check this). You will probably need root privileges for that (run with sudo).

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Debian – Two usb wifi adapaters, only wlan0 appears, how to get wlan1

It appears that the device I'm using doesn't like the two wifi dongles connected in the order that I had them connected. Reversing the order in which they are connected resulted in both wifi dongles being recognised (as seen via lsusb) and then consequently configurable via /etc/network/interfaces, after which they could be brought up via ifup wlan1.

The final entries in /etc/network/interfaces that worked was:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

auto wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa.config

auto wlan1
iface wlan1 inet dhcp
    wireless-essid ardrone_3

and the results with ifconfig are:

eth0  Link encap:Ethernet  HWaddr b8:27:eb:e8:9f:ac  
      inet addr:192.168.1.132  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:5111 errors:0 dropped:0 overruns:0 frame:0
      TX packets:3001 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:431610 (421.4 KiB)  TX bytes:552794 (539.8 KiB)

lo    Link encap:Local Loopback  
      inet addr:127.0.0.1  Mask:255.0.0.0
      UP LOOPBACK RUNNING  MTU:16436  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0 Link encap:Ethernet  HWaddr 30:85:a9:6e:a6:bb  
      inet addr:192.168.1.117  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:4743 errors:0 dropped:1 overruns:0 frame:0
      TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:1322366 (1.2 MiB)  TX bytes:1309 (1.2 KiB)

wlan1 Link encap:Ethernet  HWaddr 30:85:a9:6e:a6:c9  
      inet addr:192.168.1.3  Bcast:192.168.1.255  Mask:255.255.255.0
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:5 errors:0 dropped:0 overruns:0 frame:0
      TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:2420 (2.3 KiB)  TX bytes:1476 (1.4 KiB)

As can be seen, both wifi devices are working and have received ip addresses.

It appears that the problem was not a configuration issue of debian but an issue with the hardware that required the two devices to be swapped.

A big thank you to Gert van den Berg and user1129682 for their patience with me.

Best Answer

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Debian – Two usb wifi adapaters, only wlan0 appears, how to get wlan1

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