I think this is a system specific issue (it depends on the BIOS).
Quoting Bbswitch's documentation:
On some machines, turning off the card is permanent and the card does
not reappear on subsequents reboots, which can result into the screen
staying black all the time, including the BIOS screen. If
Actually, the regression I mentioned turned out to be only a false
positive.
I can't reproduce the problem on my system, therefore I'll need your
help to debug the problem.
1) Please enable nvidia and reboot.
2) Then switch to intel, reboot, and attach the following files:
a) output of dmesg
b)
Hello Alberto,
I cannot follow your steps from 2 to 3, since 3D controller will
disappear, it is not able to switch back to nvidia.
In between step 2 and 3, I have to shutdown the system first in order to
bring back nvidia controller.
My steps:
1. Enable nvidia driver then reboot
2.
** Tags added: latest-bios-a07 regression-potential
** Tags removed: regression-potential
** Tags added: needs-bisect regression-release
** Description changed:
- Unable to switch back to nvidia graphic chip after reboot.
+ Unable to switch back to nvidia graphic chip after reboot. Switching
+
** Tags added: blocks-hwcert-enablement
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https://bugs.launchpad.net/bugs/1316095
Title:
[Nvidia GF117M] 10de:1140 3D Controller disapear after reboot
To manage notifications about
** Changed in: nvidia-prime (Ubuntu)
Assignee: (unassigned) = Alberto Milone (albertomilone)
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https://bugs.launchpad.net/bugs/1316095
Title:
[Nvidia GF117M] 10de:1140 3D
This is a regression in the kernel I'm working on (we have a private
report about it too)
** Changed in: linux (Ubuntu)
Status: Confirmed = In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Alberto Milone (albertomilone)
** Changed in: linux (Ubuntu)
Importance:
** Tags added: kernel-bug-exists-upstream
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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1316095
Title:
[Nvidia GF117M] 10de:1140 3D Controller disapear after reboot
To manage notifications about
** Description changed:
-
- Unable to switch back to nvidia graphic chip after reboot.
+ Unable to switch back to nvidia graphic chip after reboot.
Switching graphics does not requires reboot, but it does cause issue
when user had to reboot for some reason, and will not able to use
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.15 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
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