im running Ubuntu 14.04.1 LTS (desktop), on an embedded device (Odroid U3) and
on boot, my 3G usb modem is seen as a ttyACM0 / ttyACM1 device, which is correct.
Post boot i am able to simply run wvdial..and from there I can get a connection...
I am running my system headless, and would ideally like to get the OS "converted" to more
of a server configuration(smaller) if possible. I have tried running the
the ubuntu server version here viewtopic.php?f=77&t=5123, along with
multiple versions of debian(7 / 7.4) but neither will detect the usb modem correctly on boot.
I am a newbie to linux, and the only thing that I have tried is
trying to force load some of the kernel modules on boot ( /etc/modules ) to try to
alter the detection of the device on boot. (cdc_acm, usbserial, ppp....etc), no luck.
On the ubuntu server version above I even updated the kernel to
version newer than the one currently on the working desktop version, still no luck,
Does anyone have experience with usb 3G modem detection on boot??,
Any ideas why it works on the 14.04.1 LTS desktop version , and not any others?,
thanks a ton...for any suggestions
Appears that there is a patch in 14.04 ubuntu boot that fixes the usb_modeswitch issues. After taking a raw ubuntu , adding usb_modeswitch , its now working just fine.
Did not even have to configure usb_modeswitch.
Related
I'm able to ssh into pi from MacOS using ssh pi#raspberrypi.local or ssh pi#ip_address. I have been doing this for a long period of time. Now I installed Manjaro Linux along with the MacOS but I can't ssh in pi from Manjaro. ssh pi#raspberrypi.local returns name not found error while the other command times out. Works as expected when I switch back to MacOS. I've been stuck on this for a while now, I've tried multiple solutions but nothing seem to work. I have also tried re-installing and starting sshd but no luck.
You should check the information of /var/log/message on Raspberry PI, where the problem has been checked
The problem was in the Network adapter driver. If you are facing this problem check which driver are you using. If it is anything other than the Broadcom driver delete it and install the Broadcom driver and should work fine.
I have installed the latest version of ubuntu (Ubuntu 18.04.1 LTS - kernel 4.15.0-43-generic) on my pc Cherry Trail - Intel Atomx5 Z8350.
But the sound card is not recognized.
After reading some forums it seems that sound card driver is not present on my setup.
Under windows the sound card works with Intel SST Audio Device drivers while it should match the CX2072X drive-codec for linux.
I have seen the link which shows the codec driver compilation on 4.18 kernel version.
https://github.com/conexant/codec_drivers/commit/4d9cfc5188c6c2709b1d7533a363ff485294c1e3
But I do not know how to install them in my ubuntu and also do I need to install the kernel version 4.18 before these for the compatibility issue.
Sorry I am not much familiar with Linux so any kind of help would be appreciated.
I have a fresh install of 18.04 SERVER installed on an Advantech SBC. 16.04 Server was working find but on 18.04 Server when I do a:
sudo shutdown -r now
The system starts the shutdown but stops with the last status line:
[ OK ] Stopped LVM2 metadata daemon.
I've tried some different bios configurations with power management but I can't seem to get it to restart. Only option at that point is to physically kill power and power up.
Anyone seen this? Any ideas on what to try?
On my SBC setting the South Bridge USB Configuration for Windows 8.x compatibility resolved this issue. Seems that the V4.15 kernel interactions with hardware are different enough to have caused this problem.
My external monitor, connected via HDMI was working fine but now is not being detected (it says 'No video input'). I'm pretty sure I didn't make any changes to make it stop - it was working on the same setup yesterday.
I'm a pretty new linux user and also don't know much about graphics hardware and drivers. Appreciate any help, I'd like to understand what's going on!
I'm running Ubuntu 16.04.3 kernel 4.10.0-33
lshw -c video gives:
*-display
description: VGA compatible controller
product: Sky Lake Integrated Graphics
vendor: Intel Corporation
physical id: 2
bus info: pci#0000:00:02.0
version: 07
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:124 memory:f0000000-f0ffffff memory:e0000000-efffffff ioport:e000(size=64) memory:c0000-dffff
I've tried booting from grub into kernel 4.8.0 and the monitor still wasn't detected.
I've also tried to no avail:
sudo apt-get update
sudo apt-get install --reinstall xserver-xorg-video-intel xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
I've also tried running the Intel graphics update tool and this also hasn't solved anything.
EDIT: It seems like I get the 'No video input' probelm if I plug in the HDMI cord before the computer has finished booting.
Pretty much the only answer one can give here based on the available information is, try checking the display cables, and, if that doesn't help, file a bug. Debugging display problems like this can be fairly involved, with several cycles of requesting and providing more information. That doesn't really work all that well here.
The alternatives for filing the bug are Ubuntu Launchpad and drm/i915 upstream. Upstream has the best knowledge about the driver and the hardware, but, depending on the issue, you might be expected to build and run the userspace components or the kernel from upstream git repositories.
I come across the problem and solve it with exactly the same card (i had same lshw -c video) by searching the NVIDIA X-Server settings (search inside apps) on my Ubuntu 16 LTS and activate the NVIDIA drivers for this card (I have a NVIDIA GEFORCE GTX)
After i log out and i have a bad errors display and i was blocked " this computer is running in low display mode" .
I just switch off the computer and restart it...and taatatatat HDMI was working and was able to display on my external Sansumg 27''
I had the exact same issue as OP. lshw not showing HDMI port, nada. Reinstalling xserver* did not work either.
May the gods of stack overflow smile upon you for that EDIT line, because plugging only after boot was complete, it did work for me as well.
This is quite interesting, as I am running 20.04. This issue came out of nowhere, just turned on the computer and voila, it was not working. There had been no updates, no changes that could affect this during previous session.
Would love to know if someone else has bumped into this problem.
I am trying to get a viperboard USB GPIO board running on ubuntu.
I already got a newer kernel, because I understood that the 3.13 kernel doesn't support the viperboard so well.
What I want to do is to use the /sys/class/gpio sysfs interface for GPIO so I can develop raspberry pi projects on my PC and then use them
on my RPi.
My Problem - the /sys/class/gpio directory is missing.
The config of the kernel shows:
CONFIG_GPIO_SYSFS is not set
Does this mean I have to compile a new kernel?
I just had to recompile the kernel with CONFIG_GPIO_SYSFS set; now I see the /sys/class/gpio directory. Ubuntu does not enable gpio sysfs by default.
I solved my Ubuntu-GPIO problems with the pigpio library.
It runs a daemon started with sudo, which is controlling the GPIO pins. A client program (started without sudo) communicates with the deamon and thus indirectly controls the pins.
You can even run the client on a remote machine. This way a ROS node can control the GPIO pins of a remote raspberry, which itself isn't even running ROS.
See this and this post for reference.