I have following models of graphics card in my DELL Inspiron 5520 15R:
lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7500M/7600M Series] (rev ff)
Laptop has one HDMI port and one VGA port. When I try to connect two external monitors on each of these ports, I can only use one at a time.
Is there anyway to use two external screens at the same time given the configurations I mentioned above?
There is a limitation with laptops that by default you can only use one extra display at a time, reason being the graphic adapter. So to run more than 2 displays you will need a little extra hardware. You can have a look at this youtube video.
Related
I am using a Raspberry PI4 powered by the Raspberry power supply(5.1V,3A) and I have also a Coral TPU and a Telit Lte Modem attached on Raspberry USB 3.0 Ports Hub.
According with the Coral Power specifications, the USB TPU consumes about 500mhA.
Running lsusb -v seems Coral TPU to consumes 498mhA.
The Telit Lte Modem seems to consumes 500mhA and there is a VIA Labs, Inc. that consumes 100mhA
As explained in several articles and posts, Raspberry can support a maximum consumption of 1200mhA on the USB ports(all).
Why I am getting a lot of Under-Voltage Detected! messages running dmesg if power consumed by the usb ports seems less than the maximum available?
Thank you in advace!
Good day every body
I use MC7455 module in linux machine connected using PCI
but when i do : lspci , i didnt find it
and also with dmesg , it is not detected
Is this problem related to drivers missing ?
(For those wondering: This question is asking about the Sierra Wireless MC7455 LTE modem module)
Your modem card is a mini-PCI-e card, but that modem does not connect to the PCI bus. The mini-pci-e slot also connects to the USB bus. This modem card connects only to the USB bus, so it will not show up with lspci.
Instead is should show up as a USB device.
I have lots of experience with MC7304, assuming MC7455 works similar.
MC7455 has a miniPCIe interface, I assume your motherboard has such interface because you said the modem is connected. Have you installed SierraWireless driver? If not, Linux doesn't detect the modem. At least that's my case.
If you don't have a miniPCIe interface on the motherboard, you can use a miniPCIe to USB adaptor.
Once the modem is detected, for MC7304 at least, I can find modem in dmesg as well as by lspci.
Check this link: https://techship.com/faq/38/
I had exactly same issue with my Qotom Q355G4, the device was not detected at all. It was fixed by putting adhesive tape over pins #23, 25, 31, 33.
Objective
I'm trying to programmatically find out on which physical slot a particular PCIe device is connected. The premise is that I have the PCI-ID of a card that is surely occupying a slot, and the solution would be finding out which one.
Note that I'm only interested in working on the PCI Express bus, although the device identification/enumeration process I think is the same as the old PCI.
Attempt
The SMBIOS contains information about the motherboard slots available. It is possible to examine this information from the linux command line:
$ sudo dmidecode -t slot
# dmidecode 2.11
SMBIOS 2.7 present.
Handle 0x003A, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_1
Type: x16 PCI Express x16
Current Usage: In Use
Length: Short
ID: 1
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:03:02.0
Handle 0x003B, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_2
Type: x8 PCI Express x8
Current Usage: In Use
Length: Short
ID: 2
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:04:02.2
Handle 0x003C, DMI type 9, 17 bytes
System Slot Information
Designation: PCIEX16_3
Type: x16 PCI Express x16
Current Usage: In Use
Length: Short
ID: 3
Characteristics:
3.3 V is provided
Opening is shared
PME signal is supported
Bus Address: 0000:05:03.0
However, I can't find any device in the PCI bus (lspci) that has a PCI ID of 0000:03:02.0, 0000:04:02.2 or 0000:05:03.0. What I know by manual inspection is the following:
Card 0000:03:00.0 is in the first slot. The PCI bridge appears to be 0000:00:02.0
Card 0000:04:00.0 is in the second slot. The PCI bridge appears to be 0000:00:02.2
Card 0000:05:00.0 is in the third slot. The PCI bridge appears to be 0000:00:03.0
So a pattern emerges here. From the SMBIOS structure, the bus number is the one given to the card that is plugged in but the device/function numbers are the same as the corresponding PCI bridge.
Is this pattern just a coincidence in my motherboard or there is a rationale behind? It is an Asus motherboard, with an AMI BIOS. I've read that some BIOSes do not provide accurate information about their slots so I would like to know how much generality I can achieve.
Any hint or pointer to reference documentation is also greatly appreciated.
You may find the lspci command helpful. Here's a sample output:
# lspci -v -t
-[0000:00]-+-00.0 Intel Corporation 5500 I/O Hub to ESI Port
+-01.0-[01]--+-00.0 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
| \-00.1 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
+-03.0-[02]--+-00.0 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
| \-00.1 Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
+-07.0-[04]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-09.0-[05]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-14.0 Intel Corporation 7500/5520/5500/X58 I/O Hub System Management Registers
+-14.1 Intel Corporation 7500/5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers
+-14.2 Intel Corporation 7500/5520/5500/X58 I/O Hub Control Status and RAS Registers
+-1a.0 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4
+-1a.1 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5
+-1a.7 Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2
+-1c.0-[03]----00.0 LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator]
+-1d.0 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1
+-1d.1 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2
+-1d.7 Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1
+-1e.0-[06]----03.0 Matrox Electronics Systems Ltd. MGA G200eW WPCM450
+-1f.0 Intel Corporation 82801IB (ICH9) LPC Interface Controller
\-1f.2 Intel Corporation 82801IB (ICH9) 2 port SATA Controller [IDE mode]
I have a PC configuration that has an AMD APU processor with Radeon Graphics and a Discrete Radeon graphics card.
AMD recommends to use the HDMI/VGA/DVI port of the discrete video card for best performance on Windows so I have connected the HDMI port to Discrete Card.
When I boot to linux ubuntu distributive (linux mint 15) I have only video output of Xorg on the motherboard HDMI. But when the system is booting I have video output on every port. So on discrete card port i get only the "_" text. So my thought is that xorg.conf is not properly configured.
So how can I configure xorg.conf to get video output on discrete HDMI port?
So I found a solution
Just need to run in terminal after installation
sudo amdconfig --initial -f --adapter=all
Original wiki
http://wiki.cchtml.com/index.php/Ubuntu_Raring_Installation_Guide
I have a Linux virtual machine running on VMWare Fusion (on Mac OS X) that I intend to use as a development environment for an embedded system. Would it be possible for my Linux VM to talk to my embedded system's serial port using a USB-to-serial adapter? Any recommendations for what sort of adapter I should get?
There are two ways to do it:
Your host-OS supports your USB<->serial converter (very likely). If so you can just allow your VM to talk to the serial port. If so the VM will see a standard serial port and everything will be fine.
Your guest-os in the VM supports the USB<->serial converter, AND your host-OS allows raw USB forwarding.
All in all the chances are good that it works..
Btw: there are good and bad USB<->Serial converters. If you find out that the serial connection seems to work (everything detects/works as expected for a couple of seconds), but you can't get a reliable connection for a longer time, then it's very possible that the usb<->serial dongle sucks....
You get what you pay for... When buying these things I'd check comp.arch.embedded and ask which usb dongles are known to just work, and which not. (My recommendation is to stick with products from Assmann. You can order them at digikey).
I've found USB serial adaptors to be a bit hit & miss with embedded work. One thing to be aware of is that the buffering tends to work differently from "real" serial ports, and latency of characters through the system can be quite variable. Some embedded development systems (think bootloaders, cheap JTAG probes etc) can be quite sensitive to this and will give timeouts and so on.
Note this doesn't only apply to USB serial adaptors, I've had similar problems with high end multi-port serial cards, but usually with those you can tweak the FIFO / IRQ settings to get something working.
I have experienced that a USB to serial adapter with a FTDI chipset and drivers is more reliable and compatible with more devices than the Prolific chipset
Depends upon the VM software, but VMWare Fusion does support USB devices. The question becomes, does your IDE support talking to a USB device instead of an old-fashioned serial port? With Linux, probably yes.
I had no problems whit serial adapters from ATEN.
USB serial adapter is USB standard device (just like mass storage) that mean that any USB compliant adapter should work.
pl2303: I have found this device to be very reliable and are often in the generic and cheap USB to RS232 adapters. I've seen expensive adapters fail and my generic adapter from geeks.com work great.
I just picked up a USB 1.1 - RS232 adapter (Digitus DA-70119) from WeirdStuff for 10 bucks. I plugged it into my Mac mini and VMWare Fusion showed me this.
Once I clicked on the USB icon, my Ubuntu 9.10 VM had no trouble seeing it
$ lsusb
Bus 002 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
$ dmesg
usb 2-1: new full speed USB device using uhci_hcd and address 4
usb 2-1: configuration #1 chosen from 1 choice
pl2303 2-1:1.0: pl2303 converter detected
usb 2-1: pl2303 converter now attached to ttyUSB0
I can now use /dev/ttyUSB0 in my Linux VM to talk to my target system.