I have a HP pavillion g6, running Xubuntu 14.04 64-bit. I have 3 USB ports. For some reason, 2 of them stopped working this morning.
I have xserver-xorg-input-all installed, followed the instructions here which didn't work. My laptop is updated and upgraded to the latest version. lsusb outputs
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0a5c:21e3 Broadcom Corp. HP Portable Valentine
Bus 001 Device 005: ID 2188:0ae1
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubI tried on Manjaro live cd, and all ports are working. Isn't there an error log for usb ports so i can see whats going on?
My /var/log/dpkg.log and /var/log/apt/history.log are here
4 Answers
Here I got my USB3 ports not working after a while: only a restart fixes the problem.
After some research, I've found that a lot of USB3 ports presents a power management problem In a lot of different hardwares and OSs. You can find people reporting this kind of problem on Windows, Linux, etc.
So, I've disabled USB power management, and now everything is fine.
1. Disabling USB Power Management
For Ubuntu, usbcore module is compiled in the kernel, so we need to change the kernel boot parameters.
Edit the /etc/default/grub file and change the GRUB_CMDLINE_LINUX_DEFAULT line to add the usbcore.autosuspend=-1 option:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1"Note that quit splash were options already present. So keep other options you have too.
Save file and close.
2. Update grub
After save the file, update grub:
sudo update-grubAnd reboot.
3. Check autosuspend after reboot
After reboot, check autosuspend value:
cat /sys/module/usbcore/parameters/autosuspendAnd it should display -1.
I had a similar problem and lists another way to fix this
This method also edits the grub but instead of modifying GRUB_CMDLINE_LINUX_DEFAULT it modifies GRUB_CMDLINE_LINUX="".
Steps:
- Open terminal
- Type
gksudo gedit /etc/default/grubin terminal and press enter - Find the line
GRUB_CMDLINE_LINUX="" - Modify the line to read
GRUB_CMDLINE_LINUX="acpi=force irqpoll" - After that, update the bootloader via terminal by typing
sudo update-gruband pressing enter - Restart your system
This method is the same as given in the link above and it worked for me.
I use Ubuntu Desktop 14.04 64 bit.
This is simple solution you can try this:
first execute below command in terminal:
sudo dpkg-reconfigure xserver-xorgafter, reboot your computer and it's worked for me!
Check if External USB is enabled in BIOS of yours computer. In my case, it somehow changed state.
This is purely dependent on your system, however this might solve the issue like it was for me.
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