kernel-packages team mailing list archive

[Launchpad Bug Tracker <1176322@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug:

Even since ubuntu 10.04 there is a issue with vgaswitcheroo that bothers
me.

I have an Nvidia-Optimus ready laptop (Dell N5110). I am using
vgaswitchheroo to disable my dedicated graphics because my laptop
becomes very hot if i don't do it. I don't install any Nvidia-restricted
or official drivers because they make my system extremly unstable.

As you can see, vgaswitchheroo is working fine.

<pre>
root@em-hax:/# alias | grep nv
alias nv_of='echo OFF > /sys/kernel/debug/vgaswitcheroo/switch'
alias nv_on='echo ON > /sys/kernel/debug/vgaswitcheroo/switch'
root@em-hax:/# sensors | tail -5
Adapter: PCI adapter
temp1:        +61.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

root@em-hax:/# nv_of
root@em-hax:/# sensors | tail -5
Adapter: PCI adapter
temp1:            N/A  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)
</pre>

My issue is the fact that I must enable vgaswitchheroo before i shut
down my computer. If i don't do it the computer will show a black screen
and just hang.

Moreover, with vgaswitchheroo disabled, i will get an instant freeze
when i want to access tty1 for example (CTRL+ALT+F1).


Steps to reproduce this issue:
* Disable vgaswitcheroo on an optimus-capable computer with no nvidia drivers installed
* Try to shut down the computer OR press CTRL+ALT+F1

Expected results:
* Normal shutdown OR go to tty1

What happens instead:
* Computer freezes

** Affects: linux (Ubuntu)
     Importance: Low
         Status: Incomplete


** Tags: bot-comment
-- 
Crash on vgaswitcheroo is off
https://bugs.launchpad.net/bugs/1176322
You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.