Logitech driving force gt linux

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#1 2013-07-21 23:30:20

Logitech Driving Force GT,How limit 900º steering wheel angle to 200º?

Hi,
I’ve read that iRacing is going to be ported to linux soon and I’ve said to myself «Hey man! The time has come, I already can almost say. goooooood bye win!» So, I must be ready when that time comes.
I’ve got a Logitech Driving Force GT wheel. It’s well detected by the kernel at boot time and I can check that it’s well detected with jstest-gtk (its whole 900 degrees and pedals are well detected). It’s not a problem if you’re going to drive a street car, in fact it’s what must be since the 900º is a feature of this wheel. But when you need to drive an F1 you must limit the steering wheel angle to 200 or 270 degrees. In windows works perfectly with the logitech profiler, it’s the easiest thing ever, but in linux I have no idea how to do it.

When I drive an F1 car I must turn my wheel one turn and a half to reach the side limit, while the wheel of the car in the game just turns about 3/4 of a turn. We both (me with my wheel and the wheel at the videogame) reach the side end of the range at the same time, but the wheel in the videogame just turns 3/4 of a turn while I must turn one whole turn and a half.

I’ve tried with LTWheelConf ($ sudo ltwheelconf —wheel DFGT —range 200), G25manage, usb-tool. but anything succeed. I’ve read something about that since kernel 3.2 the FFB and wheels control is built into the kernel modules so these tools are not working anymore or something like that. But, if that’s true, how do we do those things that these program did now?

About Force Feed Back, it just works in Live for Speed (although not as good as in windows) while in rFactor, GTR 2, GTR Evolution, TORCS, VDrift and Speed Dreams does not work at all. But I think this needs other topic.

How can I limit the steering angle to my desired degrees?

#2 2013-07-22 08:52:55

Re: Logitech Driving Force GT,How limit 900º steering wheel angle to 200º?

May I continue this thread in the kernel & hardware forum because I’ve realize that the wheel isn’t detected with the 900 grades and full range pedals at boot time, I have to run ltwheelconf —wheel DFGT —nativemode. So it is more a device configuration than a software use of it.

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SCS Software

Logitech Driving Force GT. strongly rules by itself

Logitech Driving Force GT. strongly rules by itself

#1 Post by 21RUS [RC] » 01 Oct 2021 13:55

Re: Logitech Driving Force GT. strongly rules by itself

#2 Post by TheTiger » 01 Oct 2021 14:31

I have Driving Force GT also, you should try this settings:

Re: Logitech Driving Force GT. strongly rules by itself

#3 Post by 21RUS [RC] » 01 Oct 2021 15:57

Re: Logitech Driving Force GT. strongly rules by itself

#4 Post by TheTiger » 01 Oct 2021 16:07

Your logitech profile is correct.

Yes, I know that my settings solve only some problems. Personally I don’t have any random vibration. Most of the problems that I encounter are writted here: viewtopic.php?f=288&t=304375

Re: Logitech Driving Force GT. strongly rules by itself

#5 Post by 21RUS [RC] » 01 Oct 2021 16:21

Thank you for trying to help me. I think the SCS bug will be fixed. The problems described by you «G923 FFB» I also have them

Спасибо вам, что попытались мне помочь. Думаю SCS баг исправят. Описанные вами проблемы «G923 FFB» они у меня тоже имеются

Re: Logitech Driving Force GT. strongly rules by itself

#6 Post by gandalf7472000 » 01 Oct 2021 18:45

There are naive questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand the world. There is no such thing as a dumb question.

Re: Logitech Driving Force GT. strongly rules by itself

#7 Post by 21RUS [RC] » 08 Oct 2021 11:38

Вышло уже несколько патчей, ситуация не исправилась. У меня есть стаж вождения, и я с уверенностью могу сказать, что автомобиль себя так не ведет. Новые настройки так-же не решают проблемы.
d.radikal.ru/d38/2110/78/62fdb1caee15t.jpg
d.radikal.ru/d00/2110/3f/d1979ee8790ft.jpg
Дайте пожалуйста выбор в игре, оставить возможность вернуть старый FFB.
Если дело так дальше пойдет , как бы это печально не было, я уйду из игры.

Several patches have already been released, the situation has not improved. I have driving experience, and I can say with confidence that the car does not behave like that. The new settings also don’t solve the problem.
Please give a choice in the game, leave the opportunity to return the old FFB.
If things go on like this, no matter how sad it is, I will quit the game.

Re: Logitech Driving Force GT. strongly rules by itself

#8 Post by Harven » 08 Oct 2021 11:49

Re: Logitech Driving Force GT. strongly rules by itself

#9 Post by 21RUS [RC] » 08 Oct 2021 12:03

Re: Logitech Driving Force GT. strongly rules by itself

#10 Post by Harven » 08 Oct 2021 12:25

@Bumer if you have nothing to add on the subject then please refrain from posting.

@21RUS [RC] Do you want help or not? The video was recorded a few versions back, it doesn’t show how the wheel behaves on default settings. Please reset to default and record a new video so that we can see the issue with default settings in the current OB version.

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Logitech driving force gt linux

Wreckfest

I haven’t played Wreckfest in a while, but I’m pretty sure my steering wheel worked better before all the updates. I guess I need to reconfigure my steering wheel settings, but I pretty bad at figuring out what to change to get an improvement. Anyone want to share his configuration setup for a Logitech Driving Force GT? That would be terrific.

Thanks to all of you in advance

Here pic my DFGT settings last summer, before I wore out my DFGT and had buy me another new wheel. Have a G29 now.

FF wheels only last me 2+ years before they need replacing. Flatout 1 and 2, GRID 1 derby fig8, Gas Guzzlers Extreme and now Wreckfest, is hard on my wheels. 😛

The update in Aug «may» have changed some FFB values.
If you can’t get your DFGT dialled in after playing about with the settings,
(assume you are PC?) install the classic 2018 FFB mod (should return FFB feel back to pre «the update».

I started Wreckfest with a DFGT (paid £20 for it — GREAT wheel for the money!) but then upgraded to a Thrustmaster T300RS — WOW what a difference! IF you feel the need (and can afford the cash!) consider an upgrade, I really appreciate my T300!

oh and, if you stick with the DFGT, I recommend fitting some paddle shifters to it (the stock shift buttons are awful and unusable in games that require a lot of wheel action!).
Totally transformed my DFGT — massive improvement in WF.

Thanks for your input guys.

The mod actually drastically improves the driving experience. I also adopted Purple44’s settings but they were not that much different from those I was already using before.

I don’t think I’ll upgrade my wheel as I only play racing games every once in a while and my priorities to spend my cash are somewhere else (I need more RAM to play Cities:Skylines). The DFGT is totally enough for my casual racing needs.

I do not fully understand what the paddle shifters are for. Is it to be able to use the shift buttons even when your hands are not on 10 and 2 on the wheel? I also think the stock shift buttons not practical to use but more because I can’t always reach them easily while driving (not so much a problem when playing WF though). That’s why I use the X and triangle buttons to shift up/down.

Источник

Logitech driving force gt linux

new-lg4ff for Linux

Improved Linux module driver for Logitech driving wheels.

• Logitech WingMan Formula GP (without force feedback)
• Logitech WingMan Formula Force GP
• Logitech Driving Force
• Logitech MOMO Force Feedback Racing Wheel
• Logitech Driving Force Pro
• Logitech G25 Racing Wheel
• Logitech Driving Force GT (tested)
• Logitech G27 Racing Wheel (tested)
• Logitech G29 Driving Force (tested)
• Logitech MOMO Racing
• Logitech Speed Force Wireless Wheel for Wii

This module is not compatible with the Logitech G920 Driving Force that already has full effects support implemented by firmware and uses the HID++ driver.

Reports on success or failure using this module on untested devices are welcome.

Differences with the in-tree module

It has all the features in the in-kernel hid-logitech module and adds the following ones:

• Support for most effects defined in the Linux FF API (except inertia).
• Asynchronous operations with realtime handling of effects.
• Rate limited FF updates with best possible latency.
• Tunable sprint, damper and friction effect types gain.
• Combine accelerator and clutch.
• Use the wheel leds as a FFBmeter to monitor clipping.
• Added a system gain setting that modulates the gain setting used by applications.
• SYSFS entries for gain, autocenter, spring/damper/friction effect gain and FFBmeter.

• GMake
• GCC
• The linux-headers package matching the installed kernel version.

Build and install

The module can be installed with DKMS or manually. Follow just one of these procedures.

The module will be installed in the /usr/src directory. Removal, updates, and rebuilds for kernel upgrades will be managed by dkms . The module will load automatically at system reboot.

Follow these steps:

• Install dkms from the package manager in your system.
• Download the project to /usr/src/new-lg4ff .
• Install the module:

$ sudo dkms install /usr/src/new-lg4ff

When updating the module, update the code in /usr/src/new-lg4ff and repeat the install step.

In case you want to rebuild the module, remove it and install again:

When using DKMS the module will be installed as hid-logitech so it gets to automatically replace the old module. Once loaded, it will be displayed as hid-logitech-new though.

NOTE: If you had previously installed the module using the manual method then you must delete the module by hand: $ sudo rm /lib/modules/$(uname -r)/extra/hid-logitech-new.ko

Type the following commands inside the project directory:

In some distributions, the install step might throw some SSL errors because it’s trying to sign the module. These errors can be ignored.

Now the module is installed but not loaded.

To load the module:

To unload the module (restoring the in-kernel module):

$ sudo make unload

Check that the driver is loaded

You should see something like this (notice the version at the end of the module description):

Force Feedback clipping

There’s been work done to be able to monitor FF clipping and avoid it. The FF force level is calculated as a maximum since we can’t know the exact amount of force the wheel is applying because conditional effects are dynamic depending on wheel movements.

Games using conditional effects will report the maximum force level as if the conditional effects were playing at the maximum level. This way we may get a higher value than real one but never lower. Since the goal is to avoid clipping, this is the measure we are interested in.

Conditional effects gain can be tuned seperately for each effect type to leave more dynamic range for the other effects. The default value seems close enough to the gain used in the official Logitech driver for Windows.

Clipping isn’t necesarily bad. To allow a wider dynamic range of forces to be played, it may be good to have some very light clipping, and even lots of clipping are acceptable when crashing or driving over very rough ground.

You can use modinfo to query for available options.

New options available:

timer_msecs: Set the timer period. The timer is used to update the FF effects in the device. It changes the maximum latency and the maximum rate at which commands are sent. Maximum 4 commands every timer period get sent. The default value is 2ms, less will have no benefit and greater may add unrequired latency.

fixed_loop: Set the firmware loop mode to fixed or fast. In fixed mode it runs at about 500Hz. In fast mode it runs as fast as it can. The default is fast loop to try to minimize latencies.

timer_mode: Fixed (0), static (1) or dynamic (2). In fixed mode the timer period will not change. In static mode the period will increase as needed. In dynamic mode the timer period will be dynamic trying to maintain synch with the device to minimize latencies (default).

profile: Enable debug messages when set to 1.

spring_level: (see the corresponding SYSFS entry).

damper_level: (see the corresponding SYSFS entry).

friction_level: (see the corresponding SYSFS entry).

ffb_leds: (see the corresponding SYSFS entry).

New SYSFS entries

They are located in a special directory named after the driver, for example:

Entries in this directory can be read and written using normal file commands to get and set property values.

This entry already existed. It has been extended, setting the value to 2 combines the clutch and gas pedals in the same axis.

Get/set the global FF gain (0-65535). This property is independent of the gain set by applications using the Linux FF API.

Get/set the autocenter strength (0-65535). This property can be overwritten by applications using the Linux FF API.

Set the level (0-100) for the spring type effects.

Set the level (0-100) for the damper type effects.

Set the level (0-100) for the friction type effects.

Use the wheel leds (when present) to monitor FF levels.

• All leds off: force 150% (clipping hard).

It returns the maximum detected FF level value as an integer. It can be written to reset the value and start reading again. Values read will be always greater or equal than the last value written. Values between 0-32768 mean no clipping, greater values mean there can be clipping.

Please, use the issues to discuss bugs, ideas, etc.

THE SOFTWARE IS PROVIDED «AS IS», WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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Experimental Logitech force feedback module for Linux

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