how to turn off / control the usb led display?
Hi, I'm using the grml small 0.4. I created a hotplug event that automatically copy files to the USB stick when it's plugin. The stick is Sandisk micro cruzer 2G USB stick. Here is the dilema: I don't know when the copy will be completed without looking at the monitor, and I'm planning not to use any monitor. Is there a way to control the led; make it blinks every second when files are being copy to the stick, and/or (the most importance part) to turn OFF the led when the device is unmounted? (the "other" popular OS turns off the led when the "Safely remove hardware" is selected). Can Grml do the same action?
Another question, since I need to recompile the kernel to support more than 4 serial ports (haven't have a big success yet, newbie :) ), is there a default date configuration that I can modify to make the kernel date start from Jan 1, 2007? so it will keep running for 50+ years from now :P
Thanks and Cheers Andri
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* Andri Handoko aphandoko@yahoo.com [20070706 03:15]:
I'm using the grml small 0.4. I created a hotplug event that automatically copy files to the USB stick when it's plugin. The stick is Sandisk micro cruzer 2G USB stick. Here is the dilema: I don't know when the copy will be completed without looking at the monitor, and I'm planning not to use any monitor. Is there a way to control the led; make it blinks every second when files are being copy to the stick, and/or (the most importance part) to turn OFF the led when the device is unmounted? (the "other" popular OS turns off the led when the "Safely remove hardware" is selected). Can Grml do the same action?
Does manually loading the usbled kernel module help?
If you want to trigger the *keyboard* LEDs on your own: there exist several tools:
% acs led blink | grep -ie led -ie blink blinkd - Blinks keyboard LEDs e.g. for answering machine or fax ixbiff - notify user when mail arrives by blinking keyboard LEDs ledcontrol - scriptable keyboard led control ledcontrol-gtk - frontend for ledcontrol libparportled - manage an LED device plugged on a parallel port libparportled-dev - manage an LED device plugged on a parallel port - development files mailleds - Blink the keyboard-LEDs for incoming mail tleds - blinks keyboard LEDs for TX and RX network packets
regards, -mika-
Thanks again Mika. Manually unloading module works for some sticks.
Different USB flash drives behave differently. It seems that the led is controlled by the firmware/chip in the usb stick. There is no standard in how to handle the led on the flash drive, since it's not required to have one (also USB spec doesn't define specific cmds for flash drive). I was able to turn off the Sandisk micro drive led by removing the usb_storage module ("rmmod usb_storage"). But the same action with an unknown-brand 1G usb stick, the led stays ON. When using Lexar 1G JumpDrive, the led always stays off (mounted and unmounted), and led only blinks when it's being used actively (copy files to it, etc..)
One can also unloads "ehci_hcd" and "uhci_hcd" to switch off the led, but no other usb will work since these modules are used to control all usb devices. :)
One site mentions about sending start/stop SCSI cmd (1Bh) to flash drive to turn off the led IF its handling is present in the firmware of the flash drive. The cmds is in the LED section, Hut1_11.pdf (available in www.usb.org) I haven't try it yet, since sg_utils or sg3_utils doesn't exist in Grml Small.
What is an "acs" cmd? The "% acs led blink | grep -ie led -ie blink" cmd in Grml Small return some error messages "W: Couldn't stat source package ....". Probably the small doesn't contain description messages.
Does anybody know where in kernel configuration file (if exist) that I need to modify to change the kernel start date to be Jan 1 2000, instead of 1970?
Thanks Andri
--- Michael Prokop mika@grml.org wrote:
- Andri Handoko aphandoko@yahoo.com [20070706 03:15]:
I'm using the grml small 0.4. I created a hotplug event that
automatically
copy files to the USB stick when it's plugin. The stick is Sandisk micro cruzer 2G USB stick. Here is the dilema: I don't know when the copy will
be
completed without looking at the monitor, and I'm planning not to use
any
monitor. Is there a way to control the led; make it blinks every second
when
files are being copy to the stick, and/or (the most importance part) to
turn
OFF the led when the device is unmounted? (the "other" popular OS turns
off
the led when the "Safely remove hardware" is selected). Can Grml do the
same
action?
Does manually loading the usbled kernel module help?
If you want to trigger the *keyboard* LEDs on your own: there exist several tools:
% acs led blink | grep -ie led -ie blink blinkd - Blinks keyboard LEDs e.g. for answering machine or fax ixbiff - notify user when mail arrives by blinking keyboard LEDs ledcontrol - scriptable keyboard led control ledcontrol-gtk - frontend for ledcontrol libparportled - manage an LED device plugged on a parallel port libparportled-dev - manage an LED device plugged on a parallel port - development files mailleds - Blink the keyboard-LEDs for incoming mail tleds - blinks keyboard LEDs for TX and RX network packets
regards, -mika-
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* Andri Handoko aphandoko@yahoo.com [20070713 23:15]:
[...]
What is an "acs" cmd?
% which acs acs: aliased to apt-cache search
The "% acs led blink | grep -ie led -ie blink" cmd in Grml Small return some error messages "W: Couldn't stat source package ....". Probably the small doesn't contain description messages.
Run 'apt-get update' (known as 'au') before running acs. :)
regards, -mika-
Teilnehmer (2)
-
Andri Handoko -
Michael Prokop