Date: Wed, 04 Feb 2015 04:14:49 -0500 Subject: Documentation: implement theme, drastically improve readability --- (limited to 'docs/misc/index.html') diff --git a/docs/misc/index.html b/docs/misc/index.html index f4e7836..a4e0aba 100644 --- a/docs/misc/index.html +++ b/docs/misc/index.html @@ -13,74 +13,82 @@ -

Miscellaneous

- Or Back to main index. -

High Pitched Whining Noise on Idle (how to remove in Trisquel) -
- Powertop - how to use
- Powertop - Start automatically at boot time
-
High Pitched Whining Noise on Idle (how to remove in Parabola)
X60/T60: Serial port - how to use (for dock owners)
Using diff and patch
Get EDID: Find out the name (model) of your LCD panel

- -

High Pitched Whining Noise on Idle (how to remove in Trisquel)

Miscellaneous

+ Or Back to main index. +

High Pitched Whining Noise on Idle (how to remove in Trisquel) +
- Powertop - how to use
- Powertop - Start automatically at boot time
+
High Pitched Whining Noise on Idle (how to remove in Parabola)
X60/T60: Serial port - how to use (for dock owners)
Using diff and patch
Get EDID: Find out the name (model) of your LCD panel

- Tested in Trisquel 6 and 7. -

Powertop - how to use

High Pitched Whining Noise on Idle (how to remove in Trisquel)

Now you can use this command to kill that noise:
- $ sudo powertop --auto-tune

+ Tested in Trisquel 6 and 7. +

You can also run it without parameters and then go into 'Tunables' and set everything to 'Good'

Powertop - how to use

Note: On Trisquel 6, you will need to use a later powertop version from git. The one in the repositories is too old. See below:

Now you can use this command to kill that noise:
+ $ sudo powertop --auto-tune

Powertop - Start automatically at boot time (Trisquel 6)

You can also run it without parameters and then go into 'Tunables' and set everything to 'Good'

Included with libreboot is a script called 'powertop.trisquel6'. Run this and it will setup powertop to run with --auto-tune - at boot time. Load the file in your text editor to see how it does that.

Note: On Trisquel 6, you will need to use a later powertop version from git. The one in the repositories is too old. See below:

$ ./powertop.trisquel6

Powertop - Start automatically at boot time (Trisquel 6)

For Trisquel 7 users:

$ ./powertop.trisquel7

Included with libreboot is a script called 'powertop.trisquel6'. Run this and it will setup powertop to run with --auto-tune + at boot time. Load the file in your text editor to see how it does that.

$ ./powertop.trisquel6

For Trisquel 7 users:

$ ./powertop.trisquel7

High Pitched Whining Noise on Idle (how to remove in Parabola)

+ +

The following removes most of the noise. It reduces what is a high frequency whine - (that not everyone can hear) to a slight buzz (which most people can't hear or doesn't bother most people).

This is not perfect! The full solution is still not discovered but this is a step towards that. - Also, in some instances you will need to run 'sudo powertop --auto-tune' again. - This needs to be implemented properly in coreboot itself!

High Pitched Whining Noise on Idle (how to remove in Parabola)

On the X60 with coreboot or libreboot, there is a high pitched sound when idle. - So far we have use processor.max_cstate=2 or idle=halt in GRUB. - These consume power. Stop using them!

The following removes most of the noise. It reduces what is a high frequency whine + (that not everyone can hear) to a slight buzz (which most people can't hear or doesn't bother most people).

Be root
- $ su -

This is not perfect! The full solution is still not discovered but this is a step towards that. + Also, in some instances you will need to run 'sudo powertop --auto-tune' again. + This needs to be implemented properly in coreboot itself!

Installed powertop:
- # pacman -S powertop

On the X60 with coreboot or libreboot, there is a high pitched sound when idle. + So far we have use processor.max_cstate=2 or idle=halt in GRUB. + These consume power. Stop using them!

and added the following to /etc/systemd/system/powertop.service :

Be root
+ $ su -

+ +

Installed powertop:
+ # pacman -S powertop

+ +

and added the following to /etc/systemd/system/powertop.service :


 [Unit]
@@ -98,85 +106,93 @@ WantedBy=multi-user.target

Finally, as root do that:
- # systemctl enable powertop
- # systemctl start powertop

- -

The next time you boot the machine, the buzz will be gone.

- -

Finally, as root do that:
+ # systemctl enable powertop
+ # systemctl start powertop

+ +

The next time you boot the machine, the buzz will be gone.

+ +

X60/T60: Serial port - how to use (for dock owners)

+ For the Thinkpad X60 you can use the "UltraBase X6" dock (for the X60 Tablet it is called + X6 Tablet UltraBase). For the ThinkPad T60, + you can use the "Advanced Mini Dock". +

+ If you are using one of the ROM images with 'serial' in the name, then you have serial port enabled in libreboot + and you have memtest86+ included inside the ROM. Connect your null modem cable to the serial port on the dock + and connect the other end to a 2nd machine using your USB Serial adapter. +

+ On the 2nd machine, you can try this (using GNU Screen):
+ $ sudo screen /dev/ttyUSB0 115200 +

+ How to quit GNU Screen: Ctrl+A then release and press K, and then press Y. +

There are also others like Minicom but I like GNU Screen

+ By doing this before booting the X60/T60, you will see console output from libreboot. You will also see + GRUB displaying on the serial output, and you will be able to see MemTest86+ on the serial output aswell. + You can also configure your distro so that a terminal (TTY) is accessible from the serial console. +

+ The following guide is for Ubuntu, and can be followed for Trisquel 6.0 which is based on Ubuntu 12.04 + (should also work in Trisquel 7, based on Ubuntu 14.04) to enable a serial console using GeTTY:
+ https://help.ubuntu.com/community/SerialConsoleHowto +

+ Note: part of the tutorial above requires changing your grub.cfg. Just change the linux line to add instructions for enabling getty. + See ../gnulinux/grub_cbfs.html. +

+ +

Get EDID: Find out the name (model) of your LCD panel

+ Get the panel name with sudo get-edid | strings
+ Or look in /sys/class/drm/card0-LVDS-1/edid +

+ Alternatively you can use i2cdump. In Trisquel, this is in the package i2c-tools.
+ $ sudo modprobe i2c-dev
+ $ sudo i2cdump -y 5 0x50
+ $ sudo rmmod i2c-dev
+ You'll see the panel name in the output (from the EDID dump). +

+ If neither of these options work (or they are unavailable), physically removing the LCD panel is an option. + Usually, there will be information printed on the back. +

+ +

- -

X60/T60: Serial port - how to use (for dock owners)

- For the Thinkpad X60 you can use the "UltraBase X6" dock (for the X60 Tablet it is called - X6 Tablet UltraBase). For the ThinkPad T60, - you can use the "Advanced Mini Dock". -

- If you are using one of the ROM images with 'serial' in the name, then you have serial port enabled in libreboot - and you have memtest86+ included inside the ROM. Connect your null modem cable to the serial port on the dock - and connect the other end to a 2nd machine using your USB Serial adapter. -

- On the 2nd machine, you can try this (using GNU Screen):
- $ sudo screen /dev/ttyUSB0 115200 -

- How to quit GNU Screen: Ctrl+A then release and press K, and then press Y. + Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
+ This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions. + A copy of the license can be found at ../license.txt.

There are also others like Minicom but I like GNU Screen

- By doing this before booting the X60/T60, you will see console output from libreboot. You will also see - GRUB displaying on the serial output, and you will be able to see MemTest86+ on the serial output aswell. - You can also configure your distro so that a terminal (TTY) is accessible from the serial console. -

- The following guide is for Ubuntu, and can be followed for Trisquel 6.0 which is based on Ubuntu 12.04 - (should also work in Trisquel 7, based on Ubuntu 14.04) to enable a serial console using GeTTY:
- https://help.ubuntu.com/community/SerialConsoleHowto -

- Note: part of the tutorial above requires changing your grub.cfg. Just change the linux line to add instructions for enabling getty. - See ../gnulinux/grub_cbfs.html. -

- -

Get EDID: Find out the name (model) of your LCD panel

- Get the panel name with sudo get-edid | strings
- Or look in /sys/class/drm/card0-LVDS-1/edid + This document is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ../license.txt for more information.

- Alternatively you can use i2cdump. In Trisquel, this is in the package i2c-tools.
- $ sudo modprobe i2c-dev
- $ sudo i2cdump -y 5 0x50
- $ sudo rmmod i2c-dev
- You'll see the panel name in the output (from the EDID dump). -

- If neither of these options work (or they are unavailable), physically removing the LCD panel is an option. - Usually, there will be information printed on the back. -

- -

- Copyright © 2014 Francis Rowe <info@gluglug.org.uk>
- This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions. - A copy of the license can be found at ../license.txt. -

- -

- This document is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See ../license.txt for more information. -

+ +

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