Indeed the issue of not having a supported driver for the GTX 750ti is
gone!
I now have "nvidia-340-updates" in Ubuntu/Kubuntu LTS 14.04
This new nvidia driver version was added in 14.04 as of a few weeks ago.
The ticket can be closed, except for maybe that the matching of devices
to graphics
Thanks jaunmanuel for finding the fix and sharing the knowledge
about how you found it.
I'll add redirecting 'aplay' temporarily to a script to my list of
debugging techniques :-)
:-) Nice to hear!
Juan Manuel Cabo
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To Martin Pitt: Thank you very much for the fix. I manually applied
that commit to my sl_modem.py and it of course works. Restarting the
computer, or running ubuntu-drivers list doesn't result in a second
instance of pulseaudio.
Also, the duplicate bug:
USB microphone inputs not
On saturday I made some tests and found the root CAUSE of the issue, and
the SOLUTION.
The reason aplay is called, is because it is used to enumerate sound cards,
(with the -l argument as in aplay -l), by ubuntu-drivers, to find ye-old
software modems.
The ubuntu-drivers-common package scripts
I'm sorry that the previous post was too long.
This is the summary:
1) aplay -l gets called with an empty environment by a script in
ubuntu-drivers-common which Kubuntu runs at startup, through the
DriverManager_DBus.
aplay -l doesn't find a pulseaudio and creates a new one (through libasound),
*** This bug is a duplicate of bug 1296425 ***
https://bugs.launchpad.net/bugs/1296425
I found the root cause and wrote it in comments 21 and 22 of the
duplicate bug:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-
common/+bug/1296425
SUMMARY: ubuntu-drivers-common
Public bug reported:
I'm on Ubuntu 14.04 (Trusty), up to date, on a computer with an NVidia
GTX 750ti graphics card. I also tested on Utopic with a live daily dvd
and the problem persists.
The list under Additional Drivers is empty for my NVidia GTX 750ti video card:
Also, running:
Output of lspci -v -nn and a screenshot has been attached.
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https://bugs.launchpad.net/bugs/1351699
Title:
Additional Drivers / Driver Manager shows no
** Attachment added: Output of lspci -v -nn
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331-updates/+bug/1351699/+attachment/4168339/+files/lspci_v_nn.txt
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** Tags removed: utopy
** Tags added: utopic
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https://bugs.launchpad.net/bugs/1351699
Title:
Additional Drivers / Driver Manager shows no drivers for
$ lspci | grep NVIDIA
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce
GTX 750 Ti] (rev a2)
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)
$ lspci -v -nn | grep NVIDIA
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107
Navigating nvidia's website, I found that the 750ti was officially
suported starting from the linux driver version 334.21:
334.21 March 3, 2014
Linux x64 (AMD64/EM64T) Display Driver-Release Highlights
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