Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: bbswitch (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1338404
Title:
bbswitch: fails to find ACPI handle for discrete card
Status in “bbswitch” package in Ubuntu:
Confirmed
Bug description:
Hi,
I have a GeForce 9600 GT discrete card providing a third monitor on my
14.04 Trusty system. The first two monitors are connected to the
onboard Intel i7-3770 HD graphics.
This is a contiunation of launchpad bug #1310023, where Alberto Milone
wrote:
"""
@Hamish: that is a problem with bbswitch:
[ 17.706791] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[ 17.706792] bbswitch: No discrete VGA device found
Please file a bug report against bbswitch.
"""
You can find full debug logs in ticket #1310023, but briefly,
bbswitch-dkms package version 0.7-2ubuntu1
dmesg:
"""
[ 17.693825] bbswitch: version 0.7
[ 17.693830] bbswitch: Found integrated VGA device 0000:00:02.0:
\_SB_.PCI0.GFX0
[ 17.693844] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[ 17.693845] bbswitch: No discrete VGA device found
[ 17.706786] bbswitch: version 0.7
[ 17.706789] bbswitch: Found integrated VGA device 0000:00:02.0:
\_SB_.PCI0.GFX0
[ 17.706791] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[ 17.706792] bbswitch: No discrete VGA device found
"""
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen
Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation G94 [GeForce 9600 GT]
(rev a1)
fyi as per the previous ticket I upgraded ubuntu-drivers-common to version
1:0.2.91.6 from trusty-proposed, but as in comment 23 there the same "cannot
find ACPI handle" was present in dmesg before upgrading that package.
The machine is dual boot with Windows 7, on the Windows side of things the
three monitor setup works fine.
?
thanks,
Hamish
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