So I tried debugging the issue by inserting some print statements into
the script on every call to update-alternatives --set, but I seem to be
missing the crucial calls in some way:
$ LC_ALL=C sudo prime-select nvidia
Info: the current GL alternatives in use are: ['nvidia-361-prime', None]
Info: the current EGL alternatives in use are: ['nvidia-361-prime', None]
Info: selecting nvidia-361 for the nvidia profile
('gl_alternative:', '/usr/lib/nvidia-361/ld.so.conf')
('In set_alternatives, path is:', '/usr/lib/nvidia-361/ld.so.conf')
update-alternatives: using /usr/lib/nvidia-361/ld.so.conf to provide
/etc/ld.so.conf.d/i386-linux-gnu_GL.conf (i386-linux-gnu_gl_conf) in manual mode
update-alternatives: warning: skip creation of
/usr/lib32/vdpau/libvdpau_nvidia.so.1 because associated file
/usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so.1 (of link group
i386-linux-gnu_gl_conf) doesn't exist
update-alternatives: warning: skip creation of /usr/lib32/libvdpau_nvidia.so
because associated file /usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so (of link
group i386-linux-gnu_gl_conf) doesn't exist
('egl_alternative:', '/usr/lib/nvidia-361/ld.so.conf')
('In set_alternatives, path is:', '/usr/lib/nvidia-361/ld.so.conf')
update-alternatives: using /usr/lib/nvidia-361/ld.so.conf to provide
/etc/ld.so.conf.d/i386-linux-gnu_EGL.conf (i386-linux-gnu_egl_conf) in manual
mode
Could it be that the issue isn't at all what I believe it to be. That
the warnings update-alternatives give are not related to the issue?
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-prime in Ubuntu.
https://bugs.launchpad.net/bugs/1591979
Title:
prime-select nvidia tries to use nonexisting folder lib32 causing
failure to switch graphics card
Status in nvidia-prime package in Ubuntu:
New
Bug description:
When running prime-select nvidia on 32-bit Ubuntu 16.04, the following
is the output:
```
$ LC_ALL=C sudo prime-select nvidia
Info: the current GL alternatives in use are: ['nvidia-361-prime', None]
Info: the current EGL alternatives in use are: ['nvidia-361-prime', None]
Info: selecting nvidia-361 for the nvidia profile
update-alternatives: using /usr/lib/nvidia-361/ld.so.conf to provide
/etc/ld.so.conf.d/i386-linux-gnu_GL.conf (i386-linux-gnu_gl_conf) in manual mode
update-alternatives: warning: skip creation of
/usr/lib32/vdpau/libvdpau_nvidia.so.1 because associated file
/usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so.1 (of link group
i386-linux-gnu_gl_conf) doesn't exist
update-alternatives: warning: skip creation of /usr/lib32/libvdpau_nvidia.so
because associated file /usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so (of link
group i386-linux-gnu_gl_conf) doesn't exist
update-alternatives: using /usr/lib/nvidia-361/ld.so.conf to provide
/etc/ld.so.conf.d/i386-linux-gnu_EGL.conf (i386-linux-gnu_egl_conf) in manual
mode
```
The important part is "file
/usr/lib32/nvidia-361/vdpau/libvdpau_nvidia.so.1 doesn't exist" which
is entirely true since there is no folder /usr/lib32 on my system. I
figure that /usr/lib32 exists on 64-bit systems with ia32-libs
installed and that this program has simply never been tested on a
32-bit machine.
The machine in question has nvidia-prime 0.8.2 installed. What I
expected to happen when I ran prime-select nvidia was of course that
the proprietary nvidia driver would be used as the display driver on
my next reboot - something which doesn't happen. Instead the open
source Intel driver is used.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: nvidia-prime 0.8.2
Uname: Linux 4.5.0-040500-generic i686
NonfreeKernelModules: ctr ccm msr cdc_mbim cdc_ncm cdc_acm cdc_wdm usbnet mii
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core
videodev media btusb btrtl btbcm btintel bluetooth binfmt_misc drbg ansi_cprng
dm_crypt arc4 iwldvm intel_rapl x86_pkg_temp_thermal snd_hda_codec_conexant
snd_hda_codec_generic intel_powerclamp mac80211 crc32_pclmul snd_hda_intel
aesni_intel aes_i586 xts snd_hda_codec lrw gf128mul snd_hda_core ablk_helper
cryptd joydev snd_hwdep input_leds iwlwifi snd_seq_midi snd_seq_midi_event
serio_raw snd_pcm thinkpad_acpi snd_rawmidi nvram cfg80211 snd_seq lpc_ich
snd_seq_device snd_timer mei_me snd mei soundcore wmi shpchp mac_hid kvm_intel
kvm irqbypass cuse coretemp parport_pc ppdev lp parport autofs4 hid_generic
usbhid hid i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect psmouse
sysimgblt ahci fb_sys_fops e1000e libahci drm ptp pps_core fjes video
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
Date: Mon Jun 13 14:43:28 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-08-07 (1040 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386
(20130213)
SourcePackage: nvidia-prime
UpgradeStatus: Upgraded to xenial on 2016-03-17 (87 days ago)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1591979/+subscriptions
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