This is an odd question. I sometimes work with elderly, disabled or other people to help them with computer stuff and/or installation etc. as a volunteer.
Now I have a client who has been blind due to an accident for the past 24 years. The whole digital revolution has past by him essentially.
So now he has had some operations and can see (partially) again and he wants to learn computer things (email, photo stuff, drawing etc. (he was a choreographer and did design things). He has lost a lot of contacts because nobody wants to read/write analogue letters anymore.
Thing is, he says he has a huge problem with the color blue on screens and wants it (partially) disabled.
In Color Management in settings (I use Tumbleweed Gnome, don’t know yet what Linux I’m going to provide him with) you can choose existing color profiles for a screen, but not make one yourself.
I would like it to be an easy graphical tool so he will be able to use it himself in the future.
Well, no idea about GNOME, but for KDE there is kgamma, which allows exactly this e.g.
Of course its settings would not be applied when logging into GNOME, but it does allow to write the Gamma values into /etc/X11/xorg.conf (I’m not sure whether this still works though, at least it doesn’t if that file does not exist in the first place).
In any case, as indicated, Xorg does allow to set the Gamma (for each primary color, i.e. red, green, and blue, separately).
See “man xorg.conf”, the option is called “Gamma”.
Or you can use xgamma or xrandr to set the Gamma values, see the respective man pages.
There might be another graphical tool to configure this, but I am not aware of any. If using the proprietary nvidia driver, it might even be possible with nvidia-settings, but I’m not sure.
This is an odd question. I sometimes work with elderly, disabled or
other people to help them with computer stuff and/or installation etc.
as a volunteer.
Now I have a client who has been blind due to an accident for the past
24 years. The whole digital revolution has past by him essentially.
So now he has had some operations and can see (partially) again and he
wants to learn computer things (email, photo stuff, drawing etc. (he was
a choreographer and did design things). He has lost a lot of contacts
because nobody wants to read/write analogue letters anymore.
Thing is, he says he has a huge problem with the color blue on screens
and wants it (partially) disabled.
In Color Management in settings (I use Tumbleweed Gnome, don’t know yet
what Linux I’m going to provide him with) you can choose existing color
profiles for a screen, but not make one yourself.
I would like it to be an easy graphical tool so he will be able to use
it himself in the future.
Does anybody know something like this?
Tnx already
Hi
If your wanting a profile then colormgr and gcm-calibrate are there;
colormgr get-devices
gcm-calibrate --device "Device ID from above"
There is also the qt3 based lprof.
If you do a zypper search on icc there are other profiles that can be
installed.
–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.39-47-default
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Unfortunately I do not have an answer for you, but I will say Good on You for doing what you do. I refurbish pc’s that people throw out, then donate them to Veterans.
That is kgamma, which I already mentioned in my first reply.
But I think it is not installed by default, it is in the standard repos though.
And as mentioned, applying the settings would probably only work with KDE.
Yeah, sorry. It is actually installed by default. It is there in a Tumbleweed install I did yesterday. No idea why I thought it isn’t any more…
Btw, applying the settings at login never worked in KDE4 until I fixed that about a year ago (for 4.13), this apparently had been forgotten when porting it from KDE3.
When I submitted my first version of the patch to KDE for review, I got comments that kgamma is going to be dropped in Plasma5 anyway so why bother (in the end I managed to fix it with a much simpler patch that was accepted). Nevertheless it has been ported to KF5/Plasma5 recently, but again, applying the settings on login doesn’t work… :\ I do have a patch ready to fix it again though (a one-liner), which I’ll submit later (the package in my repo does work already).
The Graphics Card Software, how can I have missed this!
(oh well, because I never used proprietary graphics card software on Linux this slipped my mind
He is going to buy a new laptop, so I guess it’ll be something with NVidia because of this software.
Take care with NVIDIA on laptops. Most now are Optimus and that takes special handling. That idea with Optimus is that since most GPU are power hogs and reduce battery time they set things up to run the Intel driver by default and only run the NVIDIA when wanted for graphics power. This works but complicates things a lot you can not use the regular NVIDIA drivers you have to use a special one and you also need bumblebee to manage the GPU usage and NVIDIA-bumblebee driver. Using two different GPU’s on the same machin may mess with things like color settings. I suggest you look at the Laptops very closely and either avoid optimus (not sure you can) or find on that you can turn off the Intel GPU and just run the NVIDIA then you can use the normal NVIDIA driver and use the settings. It will reduce battery life though. Also not many machines allow you to turn off the GPU and in general the specs suck. I suggest a local computer store where you can actually talk to people and explain the problem and perhaps look at the BIOS to see if it has the option to turn off the Intel GPU.
The Graphics Card Software, how can I have missed this!
(oh well, because I never used proprietary graphics card software on
Linux this slipped my mind
He is going to buy a new laptop, so I guess it’ll be something with
NVidia because of this software.
Tnx!
Hi
You can do the same with the ATI Catalyst Control Center as well…
–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.39-47-default
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Tnx.
I think anyway that a i5 with Intel Graphis will do just enought for him (maybe even i3) but I don’t know if the Intel Graphics Software (if any) can do the trick…
When is the last time you did that? Because the children over here (Amsterdam) who are helping in the stores (they’re like around 20) don’t even know what Linux is! And mind you, I’m talking about several different professional computer stores! Anyway, I even mailed Dell, Lenovo and HP a few months ago to ask which laptops where best suited for a Linux installation so I wouldn’t have any driver harassment and they wouldn’t answer straight let alone guarantee working! https://forums.opensuse.org/images/icons/icon8.png
gogalthorp;2705705 Wrote:
> I suggest a local computer store where you can actually talk to
> people and explain the problem and perhaps look at the BIOS to see if
> it has the option to turn off the Intel GPU.
When is the last time you did that? Because the children over here
(Amsterdam) who are helping in the stores (they’re like around 20) don’t
even know what Linux is! And mind you, I’m talking about several
different professional computer stores! Anyway, I even mailed Dell,
Lenovo and HP a few months ago to ask which laptops where best suited
for a Linux installation so I wouldn’t have any driver harassment and
they wouldn’t answer straight let alone guarantee working! [image: https://forums.opensuse.org/images/icons/icon8.png]
Hi
I have (had) a range of HP ProBooks that run openSUSE and SLED fine,
currently have openSUSE 13.2 on a 4440s (intel dual core) and SLED 12 on
a 455 G1 AMD APU, the only thing I had to do was install the fglrx
driver for the APU boost states to work so it does hit 3.3GHz.
Bluetooth can be an issue at times, none of mine have this, but have a
USB dongle that can plug in on the various machines and use it fine.
Wireless, no issues with the atheros chips either.
I pull the hdd and dvd and put a hdd caddy in place of the
dvd and install an ssd as the main drive, data and windows on the
rotating rust and linux using bcache to the hdd as well.
–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel 3.12.39-47-default
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Does not matter be firm but friendly explain the need of having an independent NVIDIA GPU and why. Ask to be shown how to turn off the Intel GPU. If they don’t understand that ask for a tech person or manager. The object is to get hands on a actual model that they say will work and see how to turn off the ubiquitous Intel GPU. Optimus ties the GPU together electricaly so most don’t allow the shutting down of the Intel . In any case it is near impossible to get a consumer level Intel processor that does not have a GPU. On Desktops you don’t have optimus but on laptops almost all are some form. BTW helps to bring a bootable live USB stick to test things. If you buy a random machine it may simply not work as you want because of the funky Optimus hardware.
