Unable to connect to a Bluetooth device on thinkpad x260 and Ubuntu 19.04

It's been a few days since I tried to connect my Bluetooth speakers to my newly installed Ubuntu 19.04. I had no problem with a different thinkpad (x270) using Ubuntu 18.04. But I can not make it work with this one without 19.04 or 18.04.

I have no problem finding the device with blueman, but when I try to configure it, I just get a message "Can not add a device".

I tried (quite blindly) several solutions that I found online but none seemed to work.

I do not really know how to diagnose this, but some information that can help:

$ uname -r
$ dpkg --status bluez | grep & # 39; ^ Version: & # 39;
Version: 5.50-0ubuntu0ppa1 <- I've installed the latest version of bluez trying to solve this problem.

Release status bluetooth sudo service

bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (walking) since Wed. 2019-04-10 21:26:14 CEST; There are 41s
Docs: man: bluetoothd (8)
Main PID: 1084 (bluetoothd)
Status: "In progress"
Tasks: 1 (limit: 4915)
CGroup: /system.slice/bluetooth.service
841084 / usr / lib / bluetooth / bluetoothd

Friday 10 21:26:14 angrykoala-thinkpad systemd[1]: Starting the Bluetooth service ...
Friday 10 21:26:14 angrykoala-thinkpad bluetoothd[1084]: Bluetooth Daemon 5.50
Friday 10 21:26:14 angrykoala-thinkpad systemd[1]: Start the Bluetooth service.
Friday 10 21:26:14 angrykoala-thinkpad bluetoothd[1084]: Starting the SDP Server
Friday 10 21:26:14 angrykoala-thinkpad bluetoothd[1084]: Bluetooth 1.14 Management Interface Initialized
Friday 10 21:26:24 angrykoala-thinkpad bluetoothd[1084]: Registered end node: sender =: 1.81 path = / MediaEndpoint / A2DPSource
Friday 10 21:26:24 angrykoala-thinkpad bluetoothd[1084]: Registered end node: sender =: 1.81 path = / MediaEndpoint / A2DPSink

Release rfkill

0 bluetooth tpacpi_bluetooth_sw unlocked unlocked
1 wlan phy0 unlocked unlocked
2 bluetooth hci0 unlocked unlocked

Release lsusb

Bus 002, Device 001: ID 1d6b: 0003 Root Hub Linux Foundation 3.0
001 Bus 003 Appliance: ID 04f2: b52c Chicony Electronics Co., Ltd
Bus device 001 005: ID 0a5c: 640th Broadcom Corp.
Bus Device 001: ID 1d6b: 0002 Root Hub Linux Foundation 2.0

ubuntu – Is it possible to know if the smtp messaging service is activated?

Sometimes I am blocked by the courier and I do not realize that he is already late. I have users on me who ask me to fix them immediately (user information), there is a way to know that the email service is enabled. running, for example, to find out if I have the Internet service that I give in command line:

$ sudo systemctl status network-manager.service

and he answers me if he is active or not: activate (in progress)

Is there anything I can consult with the order systemctl.

The operating system is: Lubuntu 18.04

I've installed mailutils and ssmtp

Thank you in advance for your management.

dual boot – Unable to install Ubuntu on the dedicated partition of the second drive

I want to install Ubuntu on the second disk of my PC, but since it already contains data, I decided to create a dedicated partition.

This is how my disk manager displays partitioning disks:

Disk Partitioning

However, once in the Ubuntu installation program, the partition will no longer be displayed as free space, but in fact the partition will no longer be displayed.

apt – Unable to install libpng12.so.0 on Ubuntu 19.04 for Packet Tracert 7

I have encountered this problem in previous versions of Ubuntu, but I have been able to install libpng12.so.0 without any problem.

What I've tried

1 – Download it and install it locally

wget -q -O /tmp/libpng12.deb http://mirrors.kernel.org/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1_amd64.deb && dpkg -i /tmp/libpng12.deb && rm /tmp/libpng12.deb

2 – Creating a symbolic link

ln -s /usr/lib/x86_64-linux-gnu/libpng16.so.16 /usr/lib/x86_64-linux-gnu/libpng12.so.0

3 – Addition of a new report and installation via apt

echo "deb http://mirrors.kernel.org/ubuntu/ xenial main" >> /etc/apt/sources.list
apt update
apt install libpng12-0

All of these workarounds do not work.

Could someone help me solve this problem?

Thank you in advance.

How to configure signed root and leaf SSL certificates on Ubuntu 18.10 Postgresql 11 Database and Windows 10 Power BI plus PostgreSQL?

Power BI and PostgreSQL 11 are installed on Windows 10 and my main PostgreSQL 11 database on Ubuntu 18.10 Linux. I edited the postgresql.conf and pg_hba.conf files correctly on IP Addresses that my Windows 10 computer uses with PostgreSQL 11 and Power BI to connect to my PostgreSQL 11 Ubuntu database. However, I had errors in Power BI while I could log in manually via a command line.

After troubleshooting with Microsoft support, we said:

This indicates that the Postgresql server certificates are not configured and therefore can not connect to PowerBI. To allow the client to verify the identity of the server, place a root certificate on the client and a leaf certificate signed by the root certificate on the server. To allow the server to verify the client identity, place a root certificate on the server and a leaf certificate signed by the root certificate on the client. One or more intermediate certificates (usually stored with the leaf certificate) can be used.

However, I am confused by the tutorials of

I can not tell what steps need to be done on my Ubuntu PC and what steps need to be done on my Windows PC. I do not know if special steps are needed to configure Power BI with certificates. How to configure my bidirectional certificates?

Can any one offer a very detailed tutorial, tell me how to read a tutorial or explain the steps of an answer, please?

display – Ubuntu night light 18.10 blocked

I recently switched from Ubuntu 18.04 to 18.10. Everything works fine except at startup night light This function causes the screen to disappear immediately. I can then find no way to turn it off.

  • Disabling it explicitly in the display settings does not work.
  • I've tried switching from "Sunset to Sunrise" to manual, and adjusted schedules. This sometimes leads to a blinking of the screen between the night and day modes, but it disappears quickly after a few seconds of return to night mode.
  • I've tried adjusting the parameters in dconf-editor, such as temperature, just to make it usable as long as it's stuck, without effect
  • I've tried disabling and uninstalling gnome extensions that may hinder the display, but none of these solved the problem.

Just to confirm, this feature worked perfectly in 18.04.

Networking – Upgrade to Ubuntu 19.04 and RTL8723AE not working?

So, my wifi worked well with 18.10 and even with the live USB version of 19.04. However, once installed on my laptop, it seems to be detected but does not work. Wired works well.

Here are some relevant terminal outputs

> sudo lspci
> 03: 00.0 Ethernet Controller: Qualcomm Atheros Killer E220x Gigabit
> Ethernet Controller (Rev. 13) 04: 00.0 Class not assigned [ff00]: Realtek
RTS5227 PCI Express Card Reader (Rev 01)> Semiconductor Co., Ltd.
> 05: 00.0 Network Controller: Realtek Semiconductor Co., Ltd. RTL8723AE
> PCIe wireless network card

> sudo lshw -C network
> * -network
> description: wireless interface
> product: PCIe wireless network card RTL8723AE
> Supplier: Realtek Semiconductor Co., Ltd.
> physical identifier: 0
> bus info: pci @ 0000: 05: 00.0
> logical name: wlp5s0
> version: 00
> series: 24: 0a: 64: 4a: 75: 6b
> width: 64 bits
> clock: 33 MHz
> capabilities: pm msi pciexpress bus_master cap_list wireless physical ethernet
> configuration: broadcast = yes driver = rtl8723ae driverversion = 5.0.0-13-generic firmware = N / A latency = 0 link = no
> multicast = yes wireless = IEEE 802.11
> resources: irq: 17 ioport: c000 (size = 256) memory: f7800000-f7803fff

sudo lsmod
Module size used by
rfcomm 77824 16
bnep 24576 2
intel_rapl 24576 0
nvidia_uvm 831488 0
x86_pkg_temp_thermal 20480 0
intel_powerclamp 20480 0
coretemp 20480 0
snd_hda_codec_hdmi 53248 1
kvm_intel 241664 0
snd_hda_codec_realtek 114688 1
snd_hda_codec_generic 77824 1 snd_hda_codec_realtek
nvidia_drm 45056 4
nvidia_modeset 1085440 3 nvidia_drm
ledtrig_audio 16384 2 snd_hda_codec_generic, snd_hda_codec_realtek
snd_hda_intel 40960 4
snd_hda_codec 131072 4 snd_hda_codec_generic, snd_hda_codec_hdmi, snd_hda_intel, snd_hda_codec_realtek
snd_hda_core 86016 5 snd_hda_codec_generic, snd_hda_codec_hdmi, snd_hda_intel, snd_hda_codec, snd_hda_codec_realtek
nvidia 17604608 222 nvidia_uvm, nvidia_modeset
i915 1814528 3
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 102400 4 snd_hda_codec_hdmi, snd_hda_intel, snd_hda_codec, snd_hda_core
crct10dif_pclmul 16384 1
crc32_pclmul 16384 0
snd_seq_midi 20480 0
ghash_clmulni_intel 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
kvmgt 28672 0
snd_rawmidi 36864 1 snd_seq_midi
arc4 16384 2
uvcvideo 98304 0
vfio_mdev 16384 0
mdev 24576 2 kvmgt, vfio_mdev
videobuf2_vmalloc 20480 1 uvcvideo
vfio_iommu_type1 28672 0
videobuf2_memops 20480 1 videobuf2_vmalloc
vfio 32768 3 kvmgt, vfio_mdev, vfio_iommu_type1
snd_seq 69632 2 snd_seq_midi, snd_seq_midi_event
aesni_intel 372736 0
rtl8723ae 90112 0
kvm 626688 2 kvmgt, kvm_intel
videobuf2_v4l2 24576 1 uvcvideo
btcoexist 151552 1 rtl8723ae
btusb 49152 0
irqbypass 16384 1 kvm
aes_x86_64 20480 1 aesni_intel
btrtl 20480 1 btusb
rtl8723_common 24576 1 rtl8723ae
crypto_simd 16384 1 aesni_intel
btbcm 16384 1 btusb
cryptd 24576 3 crypto_simd, ghash_clmulni_intel, aesni_intel
drm_kms_helper 180224 2 nvidia_drm, i915
videobuf2_common 49152 2 videobuf2_v4l2, uvcvideo
snd_seq_device 16384 3 snd_seq, snd_seq_midi, snd_rawmidi
rtl_pci 28672 1 rtl8723ae
btintel 24576 1 btusb
glue_helper 16384 1 aesni_intel
snd_timer 36864 2 snd_seq, snd_pcm
rtlwifi 86016 4 rtl_pci, btcoexist, rtl8723ae, rtl8723_common
videodev 200704 3 videobuf2_v4l2, uvcvideo, videobuf2_common
bluetooth 557056 41, btintel, btbcm, bnep, btusb, rfcomm
drm 475136 8 drm_kms_helper, nvidia_drm, i915
intel_cstate 20480 0
mac80211 806912 2 rtl_pci, rtlwifi
ipmi_devintf 20480 0
intel_rapl_perf 16384 0
snd_hda_codec_generic, snd_seq, snd_seq_device, snd_hda_codec_hdmi, snd_hwdep, snd_hda_intel, snd_hda_codec_hdmi, snd_hda_codec, snd_hda_codec,
media 53248 4 videodev, videobuf2_v4l2, uvcvideo, videobuf2_common
joydev 24576 0
ipmi_msghandler 102400 2 ipmi_devintf, nvidia
i2c_algo_bit 16384 1 i915
input_leds 16384 0
serio_raw 20480 0
fb_sys_fops 16384 1 drm_kms_helper
rtsx_pci_ms 24576 0
syscopyarea 16384 1 drm_kms_helper
mei_me 40960 0
cfg80211 671744 2 rtlwifi, mac80211
sysfillrect 16384 1 drm_kms_helper
mxm_wmi 16384 0
sysimgblt 16384 1 drm_kms_helper
memstick 20480 1 rtsx_pci_ms
msi_wmi 20480 0
mei 102400 1 mei_me
ecdh_generic 28672 1 bluetooth
soundcore 16384 1 snd
ie31200_edac 16384 0
sparse_keymap 16384 1 msi_wmi
mac_hid 16384 0
sch_fq_codel 20480 9
parport_pc 40960 0
ppdev 24576 0
lp 20480 0
parport 53248 3 parport_pc, lp, ppdev
ip_tables 28672 0
x_tables 40960 1 ip_tables
autofs4 45056 2
hid_generic 16384 0
usbhid 53248 0
hidden 126976 2 usbhid, hid_generic
rtsx_pci_sdmmc 28672 0
psmouse 151552 0
ahci 40960 1
alx 49152 0
i2c_i801 32768 0
libahci 32768 1 ahci
rtsx_pci 61440 2 rtsx_pci_sdmmc, rtsx_pci_ms
lpc_ich 24576 0
mdio 16384 1 alx
wmi 28672 2 msi_wmi, mxm_wmi
video 45056 2 msi_wmi, i915

I have found related articles but they have several years and I have never had this problem with other versions of Ubuntu. I would appreciate any help.

Ubuntu – when creating a partition on disk, should I create for all disks?

I am new to this and I install Ubuntu alongisde windows (dual boot). I am in the process of reducing disk space. I have a SSD with 50 GB left and 1 HDT HDD with 850 GB left. I'm going to install ubuntu in the drive so I have to make room for it, but do I have to shrink the hard drive to get it in ubuntu? Thank you

apt does not work on the Ubuntu server

I've recently tried using apt on the Ubuntu 18.04 server and it was not working.

when i typed an uninstalled command, for example, nmap, i suggest you install it with:
sudo apt install nmap
so I get this:
E: Can not locate the nmap package
and this is for any package that I'm trying
I installed the Ubuntu 19 server and I had the same problem.
when i call apt list i only have the packages installed.

I have tried all the methods of cleaning the apt cache, but I have not achieved any results.
The apt update command works very well.

J & # 39; uses:
Ubuntu x64 server with qemu on Windows x64 with hax acceleration and with the user network.

google chrome – How to make sure that Ubuntu 18.04 stops asking me to unlock the connection keyring?

There are 2 floating solutions on the web to solve this problem:

  1. Disable the keychain of passwords in Ubuntu or insert a blank password. I do not think I understand all the implications of this hacking and I would not want to compromise the security of my system to solve this problem. So I'm looking for another solution.

  2. Make sure Google Chrome uses its built-in password storage instead of relying on the Ubuntu password keychain. To do this, you need to locate the Chrome launcher in system folders and add "–password-store = basic" to the exec command. None of these changes, however, modify the launcher in the dock. Or should I say "dash"? I do not know the proper terminology of Gnome but these are the shortcuts of the application in the left bar. If I click on this Chrome launcher, it still brings a lot of pop-ups that ask me to unlock the keyring.

Editing launchers like this one does something, because it fixes the launcher in the "Applications" menu. By this I mean the list of installed applications that you see when you click on the 9 points at the bottom left of the screen. (I'm sorry I did not provide the correct name for this menu, but I could not find what Gnome calls all of its UI elements).

So, if I open the menu and click on the Chrome launcher, everything is cool. But if I click on the icon located on the desktop or if I click on a Thunderbird link that launches Chrome, hell breaks loose. Not only do I get a ton of popups that ask me for my password to unlock the keyring, but some stored cookies are also reset.