Bluetooth not working on RTL8723D laptop - hci0 didn't find patch for chip id 2 , firmware error for rtl_bt/rtl8723b_config.bin failed error -2 This is a HP 15-BS576TX laptop which comes with Realtek RTL8723DE Wireless/Bluetooth module. I honestly cannot find a way to bring up the Bluetooth despite, the firmware are all available. The RTL8723DE firmware is recently available in kernel linux-firmware.git tree and I have copied it to the /lib/firmware/rtl_bt directory too.   The error is, it is asking for rtl8723b_config.bin file which is not available. Also, the bluetooth part of this laptop is detected as RTL8723B as per the kernel log. The reply from the firmware maintainer was: "Not all devices need the config file - rtl8723be does not."  lsusb -v -d 0bda:b009   :~# rfkill list all 0: phy0: Wireless LAN     Soft blocked: no     Hard blocked: no 4: hci0: Bluetooth     Soft blocked: no     Hard blocked: no   The dmesg relevant parts:  # dmesg  |grep -i bluetooth [   11.325095] Bluetooth: Core ver 2.22 [   11.325111] Bluetooth: HCI device and connection manager initialized [   11.325113] Bluetooth: HCI socket layer initialized [   11.325115] Bluetooth: L2CAP socket layer initialized [   11.325118] Bluetooth: SCO socket layer initialized [   11.414774] Bluetooth: hci0: rtl: examining hci_ver=08 hci_rev=000d lmp_ver=08 lmp_subver=8723 [   11.414775] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin [   11.466838] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2 [   11.466840] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin [   11.478765] Bluetooth: hci0: rom_version status=0 version=2 [   11.478767] Bluetooth: hci0: didn't find patch for chip id 2 [   21.410553] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [   21.410555] Bluetooth: BNEP filters: protocol multicast [   21.410557] Bluetooth: BNEP socket layer initialized   I have rtl8723D firmware in the directory and still, the kernel is detecting the device as RTL8723B and I cannot bring it up.  hci0:   Type: Primary  Bus: USB     BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0     DOWN      RX bytes:63 acl:0 sco:0 events:6 errors:0     TX bytes:18 acl:0 sco:0 commands:6 errors:0     Features: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00     Packet type: DM1 DH1 HV1      Link policy:      Link mode: SLAVE ACCEPT   When I tried,   hciconfig hci0 up  Can't init device hci0: Invalid argument (22)  tail -f /var/log/kern.log shows this:  Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.853960] Bluetooth: hci0: rtl: examining hci_ver=08 hci_rev=000d lmp_ver=08 lmp_subver=8723 Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.853970] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.854019] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2 Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.854024] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.855913] Bluetooth: hci0: rom_version status=0 version=2 Mar  8 01:51:21 HP-LAPTOP-15-BS00X kernel: [ 3116.855920] Bluetooth: hci0: didn't find patch for chip id 2   And this is how the /lib/firmware/rtl_bt looks like. It has latest firmware for RTL8723D also copied into the directory:  rtl8192ee_fw.bin rtl8192eu_fw.bin rtl8723a_fw.bin rtl8723b_fw.bin rtl8723d_config.bin rtl8723d_fw.bin rtl8761a_fw.bin rtl8812ae_fw.bin rtl8821a_fw.bin rtl8821c_config.bin rtl8821c_fw.bin rtl8822b_config.bin rtl8822b_fw.bin   What is wrong, I cannot figure out. System detects the Bluetooth hardware as RTL8723B, while the wireless module is definitely RTL8723DE as written in the back of the laptop. The driver maintainer commented that the Bluetooth part of RTL8723B and RTL8723D are similar. So, What is the right thing to try? Is there a way to load the rtl8723d firmware and config file instead of rtl8723b firmware, will it fix the problem.
How to activate bluetooth device for RTL8723DE? The wireless drivers for the RTL8723DE appeared for downloading and the module is now usable for Wi-Fi.   See   But the bluetooth part of it is yet not supported on Ubuntu. How this can be fixed?  lsusb shows  Bus 001 Device 003: ID 0bda:b009 Realtek Semiconductor Corp.    And usb-devices | awk '/0bda/' RS=  T:  Bus=01 Lev=02 Prnt=02 Port=03 Cnt=01 Dev#=  3 Spd=12  MxCh= 0 D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1 P:  Vendor=0bda ProdID=b009 Rev=02.00 S:  Manufacturer=Realtek S:  Product=802.11n WLAN Adapter S:  SerialNumber=00e04c000001 C:  #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
How much money did Harry Potter have? So, we know Harry . By descriptions from the books, it looks like he had enough money to spend during his school years with plenty to spare for later life.  Is there an estimate on how much money he had? How much would that be in muggle money? Was he extremely rich?  I'm thinking here that he could have received more than just an inheritance. For example, anonymous supporters could have given him money through the bank while he was a baby, or when he was about to go to Hogwarts, and he wouldn't have known (not even Dumbledore would have known). Change \headheight for a \pagestyle I have a document class that auto generates header from some user input. The problem is the first page should have a different page header than the others and the headline can be multi line. So \headheight is too small. Here is a demonstration of the problem:  \documentclass[twoside]{scrartcl} \newcommand{\longfirstpagehead}{% \begin{minipage}{10cm} some\\long\\text\\text\\text\\text\\text\\text \end{minipage}} \newcommand{\normalhead}{normal} \usepackage{scrpage2}  \newpagestyle{firstpage}{%     {\longfirstpagehead\hfill} %twoside links     {\longfirstpagehead\hfill} %twoside rechts     {\longfirstpagehead\hfill} %oneside     (\textwidth,1pt) }{%     {\pagemark\hfill} %twoside links     {\hfill\pagemark} %twoside rechts     {\hfill\pagemark} %oneside } %  \newpagestyle{normal}{%     {\normalhead\hfill} %twoside links     {\normalhead\hfill} %twoside rechts     {\normalhead\hfill} %oneside     (\textwidth,1pt) }{%     {\pagemark\hfill} %twoside links     {\hfill\pagemark} %twoside rechts     {\hfill\pagemark} %oneside } %    \pagestyle{normal} \AtBeginDocument{     \thispagestyle{firstpage}}  \usepackage{blindtext} \begin{document}     %\vspace*{1cm}     \blindtext      \blindtext     \pagebreak \end{document}   I tried to read the height with \settototalheight and:   add a \vspace at beginning of document (unnice hack):  still the bad box warning (of cause) first section has different alignment  manually change \headheight in pagestyle  text height and page foot is wrong (can't change this because some scoping?)  use Komascript in pagestyle  \recalctypearea warning  geometry in pagestyle  pretty much the same problem like the manual attemp    So I would like to change the \headheight for the pagestyle firstpage, but the page should still have the same page margins, etc. The problem is that this has to work with \thispagestyle. (Better Ideas are also welcome) Something like \thispagegeometry in geometry would be great. ;) Suppose Player 1 has a Dragon on the table and  in hand, while Player 2 has two Spiders on the table.  Player 1 chooses to attack with the Dragon and Player 2 chooses to block with one of the Spiders.  Before combat damage is to be dealt, Player 1 uses Unsummon on the blocking Spider.    Does Player 2 take any life damage from the attacking Dragon? Merge two custom post types into one admin page? I am building a site with 4 custom post types. To make things easier for our client/admin, I'm wondering if there is a way to merge those custom post types into one list in the backend? Like if you look at normal backend admin page with the list and columns of posts, can a page like that pull in 3 other post types for easy sorting/searching?  I can't combine the CPTs into one, they must remain seperate outside of one 'viewing' page in the admin area if possible.  Any thoughts on how to do this?? Or even where to start looking/thinkging of how to develop this? Subsample of a random sample: random sample? Let's say you have a large random sample of soccer players in Europe but you are only interested in what happens in Spain. Could you reduce your sample to players in Spain and still call it a random sample (but of a different population)? If not, how would you call that subsample and which specific precautions should you take to be able to make inferences on the population of spanish soccer players?  My feeling is that using that subsample would be fine as long as it is large enough, but maybe I am missing something. Find all primes $p$ such that  $ p^3-4p+9 $ is a perfect square.   I tried a few different values for $p$, namely $2,3,5,7,$ and $11$. The prime $p =2,7,11$ all worked but $p =13$ didn't so it makes me wonder. How can I find all primes such that it is a perfect square?  EDIT: it turns out this is problem P25 in post number #63 at What do you call somebody who asks a question and somebody who answers a question? What do you call somebody who asks a question and somebody who answers a question?  I have exhausted the thesaurus with no real luck... any ideas?  EDIT: It is in reference to this - or any other StackExchange - site in which the question is posed by X and answer is submitted by Y.    EDIT 2: In the context of StackExchange, and the fact I need plurality (something I neglected to mention oooops), I have decided upon "Posters" and "Respondents"... Are the following two sentences correct?     I want you to go to sleep.   and     I want you going to sleep.   If they are both correct, what's the difference? I kust realized that some other PC is also getting assigned a IP address (DHCP Lease) from my modem. I am sure this is not one of the PCs in my home.  My modem was using WEP security. I know WEP is far less secure and WPA is better, but this actually is a borrowed modem, and I did not know that WEP was used.  I immediately did the following : On My Modem    Changed the encryption mode from WEP to WPA   Changed the password   After this I do not see the intruder PC on the DHCP list.  On my Mac:     Changed the permissions on the public folder to "everyone - no access"   Turned off "File Sharing" in System Preferences (But I would want to turn it back on sometime)   My mac is the one that is always on, Both the admin user and the user I normally use are password protected.  Is the above sufficient? Should I do something more?  Also, is WPA security sufficient? Should I take other steps? Delete with Join in MySQL Here is the script to create my tables:   CREATE TABLE clients (    client_i INT(11),    PRIMARY KEY (client_id) ); CREATE TABLE projects (    project_id INT(11) UNSIGNED,    client_id INT(11) UNSIGNED,    PRIMARY KEY (project_id) ); CREATE TABLE posts (    post_id INT(11) UNSIGNED,    project_id INT(11) UNSIGNED,    PRIMARY KEY (post_id) );   In my PHP code, when deleting a client, I want to delete all projects posts:  DELETE  FROM posts INNER JOIN projects ON projects.project_id = posts.project_id WHERE projects.client_id = :client_id;   The posts table does not have a foreign key client_id, only project_id. I want to delete the posts in projects that have the passed client_id.  This is not working right now because no posts are deleted. I was able to star my own message by pinning it and unpinning it.  Pinning a message adds a star, even to your own messages, but when the pin is removed, the star remains. Cyclic orbit animation I'm trying to make one object orbit another. But I want it to repeat, rather than stop at 100 frames. It seems there is no option for this. Is there a way to make this happen? "one of the cables that runs" or "one of the cables that run"? Recently at work I was writing the following, and I have not been able to get a firm answer on which version is the most grammatically correct. The sentence is:     We would like to use one of the cables that _________ between rooms.   Is the correct conjugation run or runs?  I think 'run' is correct, because I think that the verb in the prepositional phrase is referring to 'cables' not 'one.' However, a number of colleagues have said that 'runs' is correct because one is singular. Make it possible to retract comment flags I misread the content of a comment, and flagged it. Then I realized that the comment wasn't what I had initially thought. Would it be possible to have the ability to retract comment flags, just like we have the ability to retract flags on questions and answers?  I'm aware of this &#32;. But the answer there is just that it's not possible. At the time it was not possible to retract any flags.   This is a separate  which requests that it may become possible to retract comment flags.  If I've realized a flag was a mistake, I think it's unnecessary to keep it in the queue of content the moderators have to look at. Also, it would add an unnecessary "rejected" to the flaggers statistics. Sure, people should think before they flag. But everyone makes mistakes sometimes. Homomorphism between free groups Let $F_a$ be the group which is freely generated by $a$ elements. How to show that there is a homomorphism from $F_a$ onto $F_b$ if and only if $b\le a$?  I was thinking one possibility is if $F_a$ generated freely by $\{x_1, \dots , x_a\}$ and $F_b$ generated freely by $\{y_1, \dots , y_b\}$ then consider map which says $\phi(x_i)=y_i$ for $1\le i \le b$ and $y_1$ otherwise. I do not know if this works or even how to proceed. How to show this fact? How to pass a list of columns to data.table where some are predetermined Evaluate $\int_0^1 \frac{\log \left( 1+x^{2+\sqrt{3}}\right)}{1+x}\mathrm dx$ I am trying to find a closed form for  $$\int_0^1 \frac{\log \left( 1+x^{2+\sqrt{3}}\right)}{1+x}\mathrm dx = 0.094561677526995723016 \cdots$$  It seems that the answer is $$\frac{\pi^2}{12}\left( 1-\sqrt{3}\right)+\log(2) \log \left(1+\sqrt{3} \right)$$  Mathematica is unable to give a closed form for the indefinite integral.  How can we prove this result? Please help me.  EDIT  Apart from this result, the following equalities are also known to exist: $$\begin{align*} \int_0^1 \frac{\log \left( 1+x^{4+\sqrt{15}}\right)}{1+x}\mathrm dx &amp;=\frac{\pi^2}{12} \left( 2-\sqrt{15}\right)+\log \left( \frac{1+\sqrt{5}}{2}\right)\log \left(2+\sqrt{3} \right) \\ &amp;\quad +\log(2)\log\left( \sqrt{3}+\sqrt{5}\right) \\ \int_0^1 \frac{\log \left( 1+x^{6+\sqrt{35}}\right)}{1+x}\mathrm dx &amp;= \frac{\pi^2}{12} \left( 3-\sqrt{35}\right)+\log \left(\frac{1+\sqrt{5}}{2} \right)\log \left(8+3\sqrt{7} \right) \\ &amp;\quad +\log(2) \log \left( \sqrt{5}+\sqrt{7}\right) \end{align*}$$  Please take a look . How to change default user in WSL Ubuntu bash on Windows 10 Someone who just thinks they know what they're talking about How long can you say "the late so and so"? When you refer to the deceased, you say "the late so and so." How long can you say that? Is JFK referred to as the late John F. Kennedy? How about Abraham Lincoln?