> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.
# 已知问题及解决方法
本页记录 Qualcomm Linux 上蓝牙的**临时**解决方法和已知问题。一旦正式修复在版本中发布，相应条目预计将被删除。请勿在生产部署中依赖本页内容。
## 解决方法
### 在 Qualcomm Dragonwing IQ-9075 EVK 上将蓝牙芯片组更改为 QCC2072
默认情况下，Dragonwing IQ-9075 EVK 使用 WCN6855 芯片组软件。要使用 QCC2072，请应用以下更改。
**步骤：**
1. 将以下补丁保存为文件名 `0001-dts-change-bt-from-wcn6855-to-qcc2072.patch`。
```patch expandable theme={null}
Subject: [PATCH] linux-qcom-6.18: Replace wcn6855 with qcc2072
Update the Bluetooth chip from wcn6855 to qcc2072
---
...emans-evk-Change-bluetooth-from-wcn6.patch | 28 +++++++++++++++++++
recipes-kernel/linux/linux-qcom_6.18.bb | 1 +
2 files changed, 29 insertions(+)
create mode 100644 recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch
diff --git a/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch b/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch
new file mode 100644
index 00000000..8e5ac1b2
--- /dev/null
+++ b/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch
@@ -0,0 +1,28 @@
+Subject: [PATCH] arm64: dts: qcom: lemans-evk: Replace wcn6855 with qcc2072
+
+Update the Bluetooth chip from wcn6855 to qcc2072.
+
+Upstream-Status: Pending
+---
+ arch/arm64/boot/dts/qcom/lemans-evk.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts
+index eec8b8a1d9ae..fc0b053f5c4b 100644
+--- a/arch/arm64/boot/dts/qcom/lemans-evk.dts
++++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts
+@@ -1099,7 +1099,7 @@ &uart17 {
+ status = "okay";
+
+ bluetooth: bluetooth {
+- compatible = "qcom,wcn6855-bt";
++ compatible = "qcom,qcc2072-bt";
+ max-speed = <3200000>;
+
+ vddrfacmn-supply = <&vreg_wcn_3p3>;
+--
+2.34.1
+
diff --git a/recipes-kernel/linux/linux-qcom_6.18.bb b/recipes-kernel/linux/linux-qcom_6.18.bb
index a1762ea5..82068146 100644
--- a/recipes-kernel/linux/linux-qcom_6.18.bb
+++ b/recipes-kernel/linux/linux-qcom_6.18.bb
@@ -25,6 +25,7 @@ SRCBRANCH:class-devupstream ?= "branch=qcom-6.18.y"
SRC_URI = " \
git://github.com/qualcomm-linux/kernel.git;${SRCBRANCH};protocol=https \
file://0001-tools-use-basename-to-identify-file-in-gen-mach-type.patch \
+ file://0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch \
"
# Additional kernel configs.
--
2.34.1
```
2. 将补丁应用到 `meta-qcom` 代码树。
3. 构建并烧录镜像。
4. 将以下固件文件推送到设备。这些文件可从 [linux-firmware 仓库](https://web.git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/qca/)获取。
* `ornbcscal11.bin` → `/lib/firmware/qca/ornbcscal11.bin`
* `ornbtfw11.tlv` → `/lib/firmware/qca/ornbtfw11.tlv`
* `ornnv11.bin` → `/lib/firmware/qca/ornnv11.bin`
5. 重启设备。
设备启动后，QCC2072 蓝牙将正常启动并按预期运行。
## 已知问题
*暂无条目。*