https://blog.flowerinsnow.cn/categories/grub/ Recent content in GRUB on 冬花ice的专栏 Hugo -- gohugo.io zh-cn 冬花ice Fri, 10 Apr 2026 17:46:03 +0800 https://blog.flowerinsnow.cn/p/gnu/linux-%E4%B8%8A%E5%8F%8C%E6%98%BE%E5%8D%A1%E4%BA%AE%E5%BA%A6%E8%B0%83%E8%8A%82%E9%97%AE%E9%A2%98/ Sun, 03 Nov 2024 13:13:48 +0800 https://blog.flowerinsnow.cn/p/gnu/linux-%E4%B8%8A%E5%8F%8C%E6%98%BE%E5%8D%A1%E4%BA%AE%E5%BA%A6%E8%B0%83%E8%8A%82%E9%97%AE%E9%A2%98/ <p>问题：即使显卡驱动安装完成，也无法调节电脑的亮度（亮度滑块无效）</p> <h2 id="注意事项"><a href="#%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9" class="header-anchor"></a>注意事项 </h2><h3 id="危险"><a href="#%e5%8d%b1%e9%99%a9" class="header-anchor"></a>危险 </h3><p style="color:red">修改系统关键配置有风险，请先备份好您的密钥以及重要文件，根据此文章执行产生的一切后果由您亲自承担</p> <h2 id="一确认问题是否一致"><a href="#%e4%b8%80%e7%a1%ae%e8%ae%a4%e9%97%ae%e9%a2%98%e6%98%af%e5%90%a6%e4%b8%80%e8%87%b4" class="header-anchor"></a>一、确认问题是否一致 </h2><details open="open"> <summary>$ bash</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">ls /sys/class/backlight/ </span></span></code></pre></td></tr></table> </div> </div></details> <p>如果你和我一样，显示了 Nvidia 的亮度调节</p> <details open="open"> <summary>console</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-console" data-lang="console"><span class="line"><span class="cl"><span class="go">nvidia_wmi_ec_backlight </span></span></span></code></pre></td></tr></table> </div> </div></details> <p>那么恭喜你，请按照下面的方法解决</p> <p>如果不是，这篇文章可能无法帮助你</p> <h2 id="二修改亮度调节显卡"><a href="#%e4%ba%8c%e4%bf%ae%e6%94%b9%e4%ba%ae%e5%ba%a6%e8%b0%83%e8%8a%82%e6%98%be%e5%8d%a1" class="header-anchor"></a>二、修改亮度调节显卡 </h2><p>一般来说问题就出在，显示桌面环境的显卡和调节亮度的显卡不一致，所以我们要把调节亮度的显卡改为核显</p> <p>编辑 GRUB 默认配置文件 <code>/etc/default/grub</code></p> <p>找到 <code>GRUB_CMDLINE_LINUX</code> 这一行</p> <details open="open"> <summary>/etc/default/grub</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-plain" data-lang="plain"><span class="line"><span class="cl">GRUB_CMDLINE_LINUX=&#34;&#34; </span></span></code></pre></td></tr></table> </div> </div></details> <p>在后面追加一段内容<code>acpi_backlight=native</code></p> <details open="open"> <summary>/etc/default/grub</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-plain" data-lang="plain"><span class="line"><span class="cl">GRUB_CMDLINE_LINUX=&#34;acpi_backlight=native&#34; </span></span></code></pre></td></tr></table> </div> </div></details> <p>如果你的这段内容本身有 <code>root=/dev/vgarch/root</code> 等内容，请在原本的内容后追加一个空格，再加该参数，例如</p> <details open="open"> <summary>/etc/default/grub</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-plain" data-lang="plain"><span class="line"><span class="cl">GRUB_CMDLINE_LINUX=&#34;root=/dev/vgarch/root acpi_backlight=native&#34; </span></span></code></pre></td></tr></table> </div> </div></details> <h2 id="三更新-grub"><a href="#%e4%b8%89%e6%9b%b4%e6%96%b0-grub" class="header-anchor"></a>三、更新 GRUB </h2><h3 id="对于-debian"><a href="#%e5%af%b9%e4%ba%8e-debian" class="header-anchor"></a>对于 Debian </h3><p>Debian 有一条命令 <code>update-grub</code>，可以轻松更新 GRUB</p> <details open="open"> <summary># bash</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">update-grub </span></span></code></pre></td></tr></table> </div> </div></details> <h3 id="对于其他发行版"><a href="#%e5%af%b9%e4%ba%8e%e5%85%b6%e4%bb%96%e5%8f%91%e8%a1%8c%e7%89%88" class="header-anchor"></a>对于其他发行版 </h3><p>其他发行版可能就没有该命令，那么可以手动重新生成 GRUB 配置文件</p> <details open="open"> <summary># bash</summary> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">grub-mkconfig -o /boot/grub/grub.cfg </span></span></code></pre></td></tr></table> </div> </div></details> <h2 id="四重启"><a href="#%e5%9b%9b%e9%87%8d%e5%90%af" class="header-anchor"></a>四、重启 </h2><p>重启计算机，问题应该就解决了</p> <h2 id="参考资料"><a href="#%e5%8f%82%e8%80%83%e8%b5%84%e6%96%99" class="header-anchor"></a>参考资料 </h2><p>[1] 啵啵粆. Linux双显卡亮度调节失效解决办法[Z/OL]. (2023-07-07)[2024-11-03]. <a class="link" href="https://www.flowerinsnow.cn/redirect?dest=https://www.bilibili.com/read/cv24842015/" target="_blank" rel="noopener" >https://www.bilibili.com/read/cv24842015/</a></p>