Re: Problem with external monitor
On 13/10/2014, Bret Busby <bret.busby@gmail.com> wrote:
> On 10/10/2014, Bret Busby <bret.busby@gmail.com> wrote:
>> This will probably show as a new thread, due to me correcting a
>> spelling error in the Subject field of the message.
>>
>> On 08/10/2014, Joe <joe@jretrading.com> wrote:
>>> On Wed, 8 Oct 2014 15:23:55 +0800
>>> Bret Busby <bret.busby@gmail.com> wrote:
>>>
>>>> Hello.
>>>>
>>>> I have a 23" monitor, that I want to use with two of my laptop
>>>> computers (not at the same time).
>>>>
>>>> I have a 15" laptop, with an i3 CPU, running Debian 6 LTS and GNOME2.
>>>>
>>>> With the external monitor connected and switched on, upon bootup, the
>>>> external monitor is automatically operational, and, replaces the
>>>> laptop display.
>>>>
>>>> That is good.
>>>>
>>>> The other laptop has a 17" display and an i7CPU, and is running Debian
>>>> 7.x and LXDE.
>>>>
>>>> With that laptop, with the external monitor connected and switched on,
>>>> upon boot up and during a boot session, the external monitor does not
>>>> work, and, is apparently not visible to the computer. The laptop
>>>> display is operational, and no signal appears to be going from the
>>>> laptop. Synaptic shows lxrandr to be installed, but the exernal
>>>> monitor is not detected.
>>>>
>>>> In Preferences -> Monitors, only one monitor is shown; the laptop
>>>> display.
>>>>
>>>> I also tried logging in to a GNOME Classic session, but got the same
>>>> result.
>>>>
>>>> Both scenario's involve the use od a VGA cable and connection to the
>>>> VGA socket on each of the respective laptops. That it is using the
>>>> supplied VGA cable, and not aDVI or HDMI cable, is not a problem for
>>>> me, as I find the resolution to be good enough for me.
>>>>
>>>> How do I get the external monitor to be detected, and, work, with the
>>>> Debian7/LXDE system?
>>>>
>>>
>>> Something I would suggest you try soon is a different model of external
>>> monitor. If you spend weeks fiddling about with drivers and then find
>>> the VGA socket on this laptop simply doesn't work, you will feel
>>> foolish, trust me on this.
>>>
>>> Something else to try would be booting up a live CD of a more
>>> commercial kind, such as Ubuntu or preferably Knoppix, to find out:
>>> a) if it works
>>> b) if so, what drivers it is using
>>>
>>> Is the external monitor going into standby, by the way? I have an old
>>> laptop and know of someone else's monitor which simply doesn't work
>>> with it. The laptop VGA circuits want to see an active monitor
>>> connected before they will power up, and the monitor wants to see a
>>> live signal before it will come out of standby, or avoid going into
>>> standby from switch-on... I haven't found any combination of switch-on
>>> time and plugging that will actually allow them to work together,
>>> though I presume there is a window of a few microseconds when they
>>> would find each other. The laptop is fine with other monitors, the
>>> monitor with other laptops.
>>>
>>
>> I have downloaded Ubuntu 14.04.1 LTS amd64 iso, and tried that.
>>
>> One interesting observation, is that, with the 15" laptop running
>> Debian 6 LTS, on bootup, all video output goes to the external monitor
>> (and to only that monitor), and, with the 17" laptop running Debian 7
>> (and then Ubuntu 14.04.1 LTS), the ACER spalsh screen and the BIOS
>> screen, go toonly the laptop monitor.
>>
>> That made me wonder whether either the BIOS or the graphics card,
>> could not deal with the external monitor.
>>
>> However, with Unbuntu 14.04.1 LTS, which took 10-15 minutes (on an i7
>> CPU with 32GM RAM) to boot, the output started to appear on the
>> external monitor, after the weird double icon with the equal sign at
>> the bottom of the screen, so I got the Ubuntu word, with the simulated
>> LED flashing things (a fake progree bar) appearing on both screens.
>>
>> At the end of the bootup, I have on the external monitor, a workspace
>> (?) with a panel/taskbar, and no icons on the desktop, and, on the
>> laptop display, I have a workspace with the dialogue box or window,
>> with the Welcome thing, with the options to select the languge, and to
>> select "Try Ubuntu" or "Install Ubuntu".
>>
>> In selecting "Try Ubuntu", I get a desktop on each of the two screens;
>> the one on the external monitor does not have the two icons "Examples"
>> and "Install Ubuntu 14.04.1 LTS", whereas the display on the laptop
>> does include those two icons.
>>
>> I can not find how to get the pointer off the laptop display and on to
>> the external monitor.
>>
>> In selecting (on the laptop display), the System Settings -> Displays,
>> I get both monitors displayed.
>>
>> When I select , for "Built In Display", "Off", the laptop display goes
>> off, for a short period, and all control goes to the external monitor,
>> and then the laptop display comes back on, with the pointer and the
>> "Launcher" (?)icons, all on the external monitor.
>>
>> After shuuting down the live session of Ubuntu 14.04.1.LTS and then
>> booting up Debian 7, to find whether the booting into Ubuntu, had
>> flicked some switch that would enable displayiong on the external
>> monitor, in Debian 7, Ifound the system to be unchanged from the
>> previous advised problem - no external monitor detected.
>>
>> In Debian 7.x, selecting (in LXDE) Preferences-> Monitor Settings,
>> which shows only the laptop display being detected, and the external
>> monitor not being detected, LXRandR shows as version number 0.1.2 .
>>
>> Booting into Ubuntu again, in selecting System Settings -> System ->
>> Details -> Overview, the Graphics is shown as Intel Haswell (Mobile).
>>
>> In System Settings -> Hardware -> Displays, both monitors are shown.
>>
>> When I run lshw in Ubuntu, in
>> pci -> pci:0 -> display, it shows as "3D Controller", the GEForce
>> GT750M,
>> and, in
>> pci -> display, it shows as "VGA compatible controller", "4th Gen Core
>> Processor Integrated Graphics Controller" ; "vendor; Intel
>> Corporation"
>> -I assume that to be the Haswell thing.
>>
>> I do not know, in Ubuntu, how to get the software name and version
>> number, that is the equivalent of the "LXRandR version number 0.1.2
>> ".
>>
>> in the Debian lxterminal lshw output, for both pci:0 -> display, and
>> display (without the pci:0 ->)the first line, hence, for both the
>> nVidia and the Haswell controllers, the line states "UNCLAIMED". I do
>> not know whether that is of any significance;
>>
>> "
>> *-pci:0
>> description: PCI bridge
>> product: Haswell PCI Express x16 Controller
>> vendor: Intel Corporation
>> physical id: 1
>> bus info: pci@0000:00:01.0
>> version: 06
>> width: 32 bits
>> clock: 33MHz
>> capabilities: pci normal_decode bus_master cap_list
>> configuration: driver=pcieport
>> resources: irq:40 ioport:4000(size=4096)
>> memory:d2000000-d2ffffff ioport:a0000000(size=536870912)
>> *-display UNCLAIMED
>> description: 3D controller
>> product: NVIDIA Corporation
>> vendor: NVIDIA Corporation
>> physical id: 0
>> bus info: pci@0000:01:00.0
>> version: a1
>> width: 64 bits
>> clock: 33MHz
>> capabilities: cap_list
>> configuration: latency=0
>> resources: memory:d2000000-d2ffffff
>> memory:a0000000-afffffff memory:b0000000-b1ffffff
>> ioport:4000(size=128) memory:b2000000-b207ffff
>> *-display UNCLAIMED
>> description: VGA compatible controller
>> product: Haswell Integrated Graphics Controller
>> vendor: Intel Corporation
>> physical id: 2
>> bus info: pci@0000:00:02.0
>> version: 06
>> width: 64 bits
>> clock: 33MHz
>> capabilities: vga_controller bus_master cap_list
>> configuration: latency=0
>> resources: memory:d3000000-d33fffff
>> memory:c0000000-cfffffff ioport:5000(size=64)
>>
>> "
>>
>> --
>> Bret Busby
>> Armadale
>> West Australia
>> ..............
>>
>> "So once you do know what the question actually is,
>> you'll know what the answer means."
>> - Deep Thought,
>> Chapter 28 of Book 1 of
>> "The Hitchhiker's Guide to the Galaxy:
>> A Trilogy In Four Parts",
>> written by Douglas Adams,
>> published by Pan Books, 1992
>>
>> ....................................................
>>
>
> I am wondering whether a problem is that Debian 7 apparently does not
> recognise the nVidia graphics card.
>
> In the thread with the subject "Nvidia No GLX to using OpenGL" is reference
> to
> https://wiki.debian.org/NvidiaGraphicsDrivers#Version_195.36.31
> and, in going there, I found
>
> "
> Identification
>
> The NVIDIA graphics processing unit (GPU) series/codename of an
> installed video card can usually be identified using the lspci
> command. For example:
>
> $ lspci -nn | grep VGA
> 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation G80
> [GeForce 8800 GTS] [10de:0193] (rev a2)
> See HowToIdentifyADevice/PCI for more information. The PCI ID can be
> used to verify device support.
>
> nvidia-detect
> The nvidia-detect script (nvidia-detect package in non-free) can also
> be used to identify the GPU and required driver:
>
> $ nvidia-detect
> Detected NVIDIA GPUs:
> 02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108
> [GeForce GT 430] [10de:0de1] (rev a1)
> Your card is supported by the default drivers.
> It is recommended to install the
> nvidia-glx
> package.
> "
>
> The command line output below (from a root terminal session) shows
> that the nvidia-detect package was not initially installed, so I
> installed it, using synaptic, and then ran the command again.
>
> "
> root@bret-av3772g-deb:/home/bret# lspci -nn | grep VGA
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell
> Integrated Graphics Controller [8086:0416] (rev 06)
> root@bret-av3772g-deb:/home/bret# nvidia-detect
> bash: nvidia-detect: command not found
> root@bret-av3772g-deb:/home/bret# nvidia-detect
> No NVIDIA GPU detected.
> root@bret-av3772g-deb:/home/bret#
> "
>
> My interpretation of that, is that Debian 7 does not detect the nVidia
> graphics adaptor, which (to me) is weird, given that lshw shows the
> nVidia graphics adaptor.
>
>
However, from Ubuntu 14.04.1.LTS, which I have now installed, and got
the external monitor working, and display output directed to only that
monitor, I have
"
bret@bret-Aspire-V3-772:~$ lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen
Core Processor Integrated Graphics Controller [8086:0416] (rev 06)
>From the Ubuntu 14.04.1 LTS lshw output, I get
"
*-pci:0
description: PCI bridge
product: Xeon E3-1200 v3/4th Gen Core Processor PCI
Express x16 Controller
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 06
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:40 ioport:4000(size=4096)
memory:d2000000-d2ffffff ioport:a0000000(size=536870912)
*-display
description: 3D controller
product: GK107M [GeForce GT 750M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:51 memory:d2000000-d2ffffff
memory:a0000000-afffffff memory:b0000000-b1ffffff
ioport:4000(size=128) memory:b2000000-b207ffff
*-display
description: VGA compatible controller
product: 4th Gen Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:48 memory:d3000000-d33fffff
memory:c0000000-cfffffff ioport:5000(size=64)
"
So, apart from having got the external monitor to work, as a "Plug and
Play" device, with Ubuntu 14.04.1 LTS, which operating system, I find
difficult to use, I am none the wiser.
--
Bret Busby
Armadale
West Australia
..............
"So once you do know what the question actually is,
you'll know what the answer means."
- Deep Thought,
Chapter 28 of Book 1 of
"The Hitchhiker's Guide to the Galaxy:
A Trilogy In Four Parts",
written by Douglas Adams,
published by Pan Books, 1992
....................................................
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