FAQ

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Please put quick Gotchas/FAQs that would be useful to other Laptop Testers here. Please add quick Gotchas/FAQs that would be useful to other Laptop Testers under the correct heading.

== Screen & Monitors ==

== Power Management ==

== Sound ==

== Networking ==

== Touchpad & Mice ==

== Docking Station/Port Replicator ==

== Additional Hardware ==

== Function and other keys ==
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== Suspend/Sleep ==

If sleep button does not work, try testing Sleep from the System->Log Out->Suspend menu. If that does not work either, or the option to Suspend does even not show up, check if Sleep is enabled in /etc/default/acpi-support (uncomment the "ACPI_SLEEP=true" line to enable), and try again. ~~["Nanotube"]

== X failing to start ==

If X is totally busted and gives you the (blue) dialogue screen stating that X is failing start, but you are unable to send any keypresses. The following may get you out of the situation enough to debug it.

  * Pressing Ctrl-d (end-of-file) may send the keystrokes that you have typed but which have been buffered and haven't appeared.
  * Pressing Alt-SysRq-e should kill most programs and allow you to switch to another virtual terminal using Alt-F2, where you should (hopefully) find a login-prompt.

== ACPI DSDT replacement ==

If you have a buggy DSDT on your machine and the ACPI isn't working, it's possible to extract and fix it. A new one can be loaded at boot-time to override the one in the BIOS by placing it in:

{{{
sudo cp my-fixed-dsdt.aml /etc/mkinitramfs/DSDT.aml
sudo mkinitramfs -o /boot/initrd.img-`uname -r` `uname -r`
}}}

== Testing 3D ==

{{{
$ which glxgears | xargs strings | grep benchmark | xargs glxgears
4913 frames in 5.0 seconds = 982.508 FPS
}}}

LunaTick: From LaptopTesting - the best way to test this is to start a terminal and type the following:
{{{
glxinfo | grep rendering
}}}
This will print either "direct rendering: Yes" or "direct rendering: No"

Dropping to a lower color depth or resolution may enable direct rendering on laptops with little video memory.

== Hotkeys Bugs ==

''Please file bug reports at:''

 * https://launchpad.net/distros/ubuntu/+source/hotkey-setup/+filebug

''following the instructions:''

 * https://wiki.ubuntu.com/LaptopTestingTeam/HotkeyResearch
----
CategoryLaptop

LaptopTestingTeam FAQ

Please add quick Gotchas/FAQs that would be useful to other Laptop Testers under the correct heading.

Screen & Monitors

Power Management

Sound

Networking

Touchpad & Mice

Docking Station/Port Replicator

Additional Hardware

Function and other keys

Hibernate

Hibernate (System->Logout->Hibernate, aka 'Suspend to Disk') will only work if have a valid and working swap partition. There kernel will complain with an error message such as: 

Aug 30 23:02:35 localhost kernel: [4325496.559000] Stopping tasks: ==============|
Aug 30 23:02:36 localhost kernel: [4325496.572000] Freeing memory...  ^H-^H\^H|^H/^Hdone (68051 pages freed)
Aug 30 23:02:36 localhost kernel: [4325497.815000] swsusp: FATAL: cannot find swap device, try swapon -a!
Aug 30 23:02:36 localhost kernel: [4325497.815000] swsusp: Restoring Highmem

You can see if you have one by doing: 

$ cat /proc/swaps
Filename                                Type            Size    Used    Priority
/dev/sda5                               partition       979924  211768  -1

Suspend/Sleep

If sleep button does not work, try testing Sleep from the System->Log Out->Suspend menu. If that does not work either, or the option to Suspend does even not show up, check if Sleep is enabled in /etc/default/acpi-support (uncomment the "ACPI_SLEEP=true" line to enable), and try again. ~~["Nanotube"]

X failing to start

If X is totally busted and gives you the (blue) dialogue screen stating that X is failing start, but you are unable to send any keypresses. The following may get you out of the situation enough to debug it.

  • Pressing Ctrl-d (end-of-file) may send the keystrokes that you have typed but which have been buffered and haven't appeared.

  • Pressing Alt-SysRq-e should kill most programs and allow you to switch to another virtual terminal using Alt-F2, where you should (hopefully) find a login-prompt.

ACPI DSDT replacement

If you have a buggy DSDT on your machine and the ACPI isn't working, it's possible to extract and fix it. A new one can be loaded at boot-time to override the one in the BIOS by placing it in: 

sudo cp my-fixed-dsdt.aml /etc/mkinitramfs/DSDT.aml
sudo mkinitramfs -o /boot/initrd.img-`uname -r` `uname -r`

Testing 3D

$ which glxgears | xargs strings | grep benchmark | xargs glxgears
4913 frames in 5.0 seconds = 982.508 FPS

LunaTick: From LaptopTesting - the best way to test this is to start a terminal and type the following: 

glxinfo | grep rendering

This will print either "direct rendering: Yes" or "direct rendering: No"

Dropping to a lower color depth or resolution may enable direct rendering on laptops with little video memory.

Hotkeys Bugs

Please file bug reports at:

following the instructions:

CategoryLaptop

LaptopTestingTeam/Old/FAQ (last edited 2012-01-21 09:57:46 by vpn-3091)