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【解决】总结 Arch Linux 下我的宏碁笔记本蓝牙无法启动问题(Qualcomm Atheros QCA9565 / AR9565)

笔记本电脑型号：
Acer E5-471G

适配器型号: QCWB335 WLAN/蓝牙二合一适配器
Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter

操作系统：
Arch Linux

内核版本:
5.12.12-arch1-1 #1 SMP PREEMPT Fri, 18 Jun 2021 21:59:22 +0000 x86_64 GNU/Linux

准备工作：
1.安装必要软件
blueman
bluez
bluez-hid2hci
bluez-utils
pulseaudio-bluetooth

症状：
使用 bluetoothctl 命令工具，检查蓝牙状态，提示没有控制器。

root:~# bluetoothctl

[bluetooth]# devices
No default controller available

使用 rfkill 命令工具，没看到蓝牙设备信息
root:~# rfkill list
0: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

=======================================================
【知识储备】：
1. Atheros QCA9565 / AR9565 网卡驱动和蓝牙驱动不一样：
网卡驱动：ath9k
蓝牙驱动：ath3k
ref:
https://wireless.wiki.kernel.org/en/users/drivers/ath3k
https://wireless.wiki.kernel.org/en/users/drivers/ath9k

2. acer_wmi 驱动导致蓝牙无法启动。
ref:
https://itectec.com/ubuntu/ubuntu-qualcomm-atheros-bluetooth-4-0-not-working-on-ubuntu-16-04/

【解决方法】：

/etc/modprobe.d 目录下建立一个文本文件(文件名自定，比如：bluetooth-fix.conf)，写入下面两行代码

options ath9k btcoex_enable=1 bt_ant_diversity=1
blacklist acer_wmi

【解释】：
options ath9k btcoex_enable=1 bt_ant_diversity=1
修改网卡驱动参数，减少 WiFi 与蓝牙的互相干扰（无线网上传速率受影响严重，蓝牙耳机声音卡顿）
ref:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1746164

blacklist acer_wmi
禁用 acer_wmi 驱动。该驱动会导致蓝牙无法启动，蓝牙图标无法出现在面板通知栏。
blacklist acer_wmi 可由 install acer_wmi /bin/false 代替，后者彻底禁用驱动，强力！

目前发现，禁用 acer_wmi 驱动对我笔记本的影响是 WLAN 快键开关失效(Fn+F3)。
其他快捷开关仍然正常工作，比如：显示屏LED背光开关，背光亮度高低，音量大小，音乐播放控制，触摸板开关，静音开关，数字键盘锁定……

！！注意：是否必须 blacklist acer_wmi？
答：必须，否则蓝牙无法启动。在系统启动时禁用，不要在进桌面后禁用，否则键盘无响应。

acer_wmi is a driver to allow you to control various parts of your Acer laptop hardware under Linux which are exposed via ACPI-WMI.
acer_wmi 是一个驱动程序，允许您在 Linux 下通过 ACPI-WMI 提供的接口，控制 Acer 笔记本电脑硬件的各个部分。

ref:
https://gitlab.inria.fr/blare/kblare/-/raw/0f8f86c7bdd1c954fbe153af437a0d91a6c5721a/Documentation/laptops/acer-wmi.txt

=======================================================
蓝牙正常后，使用命令查看状态：

root:~# rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

root:~# lsmod | grep -i bt
btusb 69632 0
btrtl 28672 1 btusb
btbcm 16384 1 btusb
btintel 32768 1 btusb
bluetooth 724992 44 btrtl,btintel,btbcm,bnep,ath3k,btusb,rfcomm

root:~# lsmod | grep acer
acer_wmi 28672 0
sparse_keymap 16384 1 acer_wmi
rfkill 28672 8 acer_wmi,bluetooth,cfg80211
i8042 32768 1 acer_wmi
wmi 36864 3 acer_wmi,wmi_bmof,mxm_wmi
video 53248 2 acer_wmi,i915

其它参考：
深度linux 无线网卡,在Deepin Linux系统无线网卡、蓝牙模块驱动安装和出现问题的解决…
https://blog.csdn.net/weixin_28716723/article/details/116659254

Acer touchpad not work after wake from suspend

sudo modprobe -r i2c_hid
sudo modprobe  i2c_hid

1 2	sudo modprobe -r i2c_hid sudo modprobe i2c_hid

vt.handoff

32 down vote

For a smooth boot process, we want to display something other than a black screen as early as possible and leave it on screen until the desktop is ready. vt.handoff=7 is part of this. We have the boot loader display an aubergine background (we wanted to have an Ubuntu logo as well, but there are problems with different aspect ratios between the boot loader and the real system, so this is the next best thing). vt.handoff=7 then causes the kernel to maintain the current contents of video memory on virtual terminal 7, which is a new “transparent” VT type. The first time that the kernel is told to switch away from VT 7, either from Plymouth or manually (Alt-F1, etc.), these contents are lost and VT 7 reverts to text mode.

The upshot is that, when everything is working correctly, you get an aubergine background on the way out of the boot loader, then at some point Plymouth displays a logo and a progress indicator on top of that, and then the display manager comes up and smoothly replaces that with a login prompt.

Also, you asked about the search command in GRUB. That is documented in the GRUB manual.

answered Apr 11 ’11 at 9:41

Colin Watson

4,66511021

How i may sacefully unable the option “vt.handoff=7” from my grub.cfg configuration,so,that be it never adding again? – user52456 Mar 28 ’12 at 16:35

@deblanck: Edit /etc/grub.d/10_linux as explained here – Serrano May 21 ’12 at 15:01

So this is separate from the gfxpayload=keep option in GRUB? i.e. if you get a desirable graphics mode in GRUB menu, and you get the aubergine blank screen and the correct desktop but get “Mode Not Supported” instead of the Plymouth splash, then this is Plymouth’s fault? – Sam Brightman Sep 12 ’15 at 12:04

gfxpayload=keep and vt.handoff=7 are two parts of the same overall scheme; gfxpayload=keep tells GRUB not to switch the video mode back to the firmware default before booting the kernel, and vt.handoff=7 tells the Linux kernel to behave as in my answer above. I don’t know where your error message comes from. – Colin Watson Sep 13 ’15 at 11:05

add a comment

why i915 driver so many bugs

sleep problem:

sleep twice led to machine forever running with black sceen，cannot sleep any more.

hibernation problem:

now or then, black screen on resume from hibernate. the longer the hibernation is, the higher possibility to resume fail.

display problem:

screen flickering（屏幕闪烁）

screen rendering glitching(花屏)

notebook lid problem

after sleep notebook, open lid again, blackscreen.

GPU Hang

sometimes fake BOSD（mouse can move, desktop freeze, no response when click any where.）

immitently(长相相似，找不到昨天看到的那个副词，间或，时不时地)

【转载】【解决】搜狗输入法Linux版无法输入中文

转自：http://www.linuxdiyf.com/linux/27070.html

相关链接：

https://bbs.deepin.org/forum.php?mod=viewthread&tid=135064http://pinyin.sogou.com

http://pinyin.sogou.com/bbs/forum.php?mod=viewthread&tid=2681081&page=1&authorid=4949417

2017-06-07 12:50:25

Ceduo 目前试用 “方法3”，以观后效。

希望药到病除！