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<a href="/2024/12/11/20241212-linux-image-driver-problem/" class="post-title-link" itemprop="url">记一次ubuntu蓝牙鼠标问题处理-linux内核编译</a>
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<p>京东新搞的华硕天选笔记本，刷成ubuntu后蓝牙鼠标一直连接不上，后来发现蓝牙本身就搜索不出任何设备，但是ubuntu蓝牙管理模块显示正常,执行 <code>dmesg | grep -i bluetooth</code> 命令只有如下报错</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">Bluetooth: hci0: Failed to <span class="built_in">read</span> codec capabilities (-22)</span><br></pre></td></tr></table></figure>
<p>虽然不清楚这个报错具体是因为什么，也许和这个报错也没什么关系。但是既然搜索不到，估计大概也许可能确定是驱动出了问题</p>
<blockquote>
<p>查看蓝牙设备信息</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">lsusb </span><br></pre></td></tr></table></figure>
<img src="/images/image-20241214205336013.png" alt="image-20241214205336013" style="zoom:100%;margin-left:0px;" />
<p>注意看厂商和设备码：<code>0489:e123</code></p>
<p>当前ubuntu内核版本：<code>6.8.0-49-generic</code></p>
<blockquote>
<p>到linux内核源码 drivers/bluetooth/btusb.c 找找是否存在 0489:e123</p>
</blockquote>
<p>结果是没有，所以系统并没有识别到这个usb设备。</p>
<blockquote>
<p>在最新内核tag检索设备码 <a target="_blank" rel="noopener" href="https://github.com/torvalds/linux/blob/v6.12/drivers/bluetooth/btusb.c">https://github.com/torvalds/linux/blob/v6.12/drivers/bluetooth/btusb.c</a></p>
</blockquote>
<p>结果是没有，瞬间塌方了。正打算随便写到蓝牙配置里时，发现master分支存在设备码<code>0489, e123</code>, 同时发现对应的patch。按照提示说明，蓝牙设备型号是RTL8852BE </p>
<img src="images/image-20241214211606055.png" alt="image-20241214211606055" style="zoom:100%;margin-left:0px;" />
<blockquote>
<p>所以需要做得就是下载内核源码，增加蓝牙驱动配置，重新编译内核，这里选择了6.9.12内核作为升级内核版本</p>
</blockquote>
<p>国内源地址:<a target="_blank" rel="noopener" href="https://mirrors.tuna.tsinghua.edu.cn/kernel/v6.x/linux-6.9.12.tar.gz">https://mirrors.tuna.tsinghua.edu.cn/kernel/v6.x/linux-6.9.12.tar.gz</a></p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">wget https://mirrors.tuna.tsinghua.edu.cn/kernel/v6.x/linux-6.9.12.tar.gz</span><br><span class="line">tar xf linux-6.9.12.tar.gz</span><br><span class="line"><span class="built_in">cd</span> linux-6.9.12.tar.gz</span><br><span class="line"><span class="comment">## 按照patch内容，修改btusb.c, 或者用patch命令，我这里直接修改的文件</span></span><br></pre></td></tr></table></figure>
<img src="images/image-20241214225553109.png" alt="image-20241214225553109" style="zoom:80%;margin-left:0px;" />
<blockquote>
<p>编译内核</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">##清理</span></span><br><span class="line">make mrproper</span><br><span class="line">make clean</span><br><span class="line"></span><br><span class="line"><span class="comment">## 复制配置过来</span></span><br><span class="line">cp /boot/config-6.8.0-49-generic .config</span><br><span class="line"><span class="comment">## make menuconfig 看情况是否要修改配置，不需要不执行</span></span><br><span class="line"><span class="comment">## 编译安装</span></span><br><span class="line">make -j 32</span><br><span class="line">make modules -j32</span><br><span class="line">make modules_install</span><br><span class="line">make install</span><br><span class="line">mkinitramfs -o /boot/initrd.img-6.9.12</span><br><span class="line">update-initramfs -c -k 6.9.12</span><br><span class="line">update-grub2</span><br><span class="line"><span class="comment">## 编译过程中报了个错，缺少对应的firmware，下载最新的复制</span></span><br><span class="line">wget https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/snapshot/linux-firmware-20241210.tar.gz</span><br><span class="line">tar xf linux-firmware-20241210.tar.gz</span><br><span class="line">cp linux-firmware-20241210/rtl_nic/* /lib/firmware/rtl_nic/</span><br><span class="line"><span class="comment">## 再次执行 make modules_install 和make install, 报错消失</span></span><br></pre></td></tr></table></figure>
<blockquote>
<p>重启，默认应该是从新的内核进入</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">reboot</span><br></pre></td></tr></table></figure>
<p>重启后尝试搜索设备，此时设备可以搜索到了，蓝牙耳机和鼠标都正常连接，耳机声音正常，窃喜。但是鼠标无法使用，移动鼠标没反应，继续搞心态。</p>
<p>找到一篇帖子，说到可能是因为bluez版本底，需要升级</p>
<p><a target="_blank" rel="noopener" href="https://superuser.com/questions/1697648/lenovo-legion-m600-wireless-bluetooth-mouse-connected-and-paired-yet-not-working">https://superuser.com/questions/1697648/lenovo-legion-m600-wireless-bluetooth-mouse-connected-and-paired-yet-not-working</a></p>
<p>按照这个说法，这是极少数设备的问题，而我刚好赶上了</p>
<p><img src="/images/image-20241214231321237.png" alt="image-20241214231321237"></p>
<blockquote>
<p>升级bluez</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment"># 下载5.x最新版本bluez，解压</span></span><br><span class="line">wget https://www.kernel.org/pub/linux/bluetooth/bluez-5.69.tar.gz</span><br><span class="line"><span class="comment">## 安装依赖</span></span><br><span class="line">apt-get install libglib2.0-dev libdbus-glib-1-dev libical-dev libreadline6-dev</span><br><span class="line"><span class="comment">## 编译安装</span></span><br><span class="line">./configure</span><br><span class="line">make -j 32</span><br><span class="line">make install</span><br></pre></td></tr></table></figure>
<blockquote>
<p>重启</p>
</blockquote>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">reboot</span><br></pre></td></tr></table></figure>
<p>重启后再次连接蓝牙鼠标，鼠标运行正常了，测试长时间不操作后鼠标能够重新唤醒，鼠标开关关闭再次打开能够连接上，速度很快。检查了/var/lib/bluetooth下的蓝牙鼠标info文件，interval速度应该是够了，如下</p>
<figure class="highlight properties"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">[General]</span></span><br><span class="line"><span class="attr">Name</span>=<span class="string">Legion M600 Mouse</span></span><br><span class="line"><span class="attr">Appearance</span>=<span class="string">0x03c2</span></span><br><span class="line"><span class="attr">AddressType</span>=<span class="string">public</span></span><br><span class="line"><span class="attr">SupportedTechnologies</span>=<span class="string">LE;</span></span><br><span class="line"><span class="attr">Trusted</span>=<span class="string">true</span></span><br><span class="line"><span class="attr">.....</span></span><br><span class="line"><span class="attr">忽略很长一段内容</span></span><br><span class="line"><span class="attr">.....</span></span><br><span class="line"><span class="attr">[ConnectionParameters]</span></span><br><span class="line"><span class="attr">MinInterval</span>=<span class="string">6</span></span><br><span class="line"><span class="attr">MaxInterval</span>=<span class="string">6</span></span><br><span class="line"><span class="attr">Latency</span>=<span class="string">3</span></span><br><span class="line"><span class="attr">Timeout</span>=<span class="string">300</span></span><br></pre></td></tr></table></figure>
<blockquote>
<p>又是折腾的一天</p>
</blockquote>
<p><img src="/images/image-20241215000515757.png" alt="image-20241215000515757"></p>
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