Je n'ai pas la réponse à ta question, Daldryk, mais tant que ça n'est pas un bug confirmé autant en discuter ailleurs. Possible que ce soit l'utilisation qui soit en cause.
++
Az'
[édit] cross posting, voilà qui confirme...

c'est un bugmonsterman a écrit :Main white light................il se passe rien niveau éclairage !!!! même avec la combinaison de touche LWin-+pav num ou avec la souris dans le cockpit !!! bug ou j'ai raté quelque chose ?
– Improved graphical performance by batching materials.
– Reduced Cockpit VRAM footprint by 30%
– Reduced Triangle Count in Cockpit by 20%.
– Built new, 5-Stage LoD meshes with diminishing geometry and texture load.
This update is dedicated to DCS MiG-21bis module.
Change Log 1.2.10.32582 Update 3
DCS MiG-21bis
First Phase of Performance Improvements:
– Improved graphical performance by batching materials.
– Reduced Cockpit VRAM footprint by 30%
– Reduced Triangle Count in Cockpit by 20%.
– Built new, 5-Stage LoD meshes with diminishing geometry and texture load.
Redefined payload to utilize the Eagle Dynamics R-60M
Fixed R-60M and R-60A warehouse listing
Tuned SAU Landing Modes
Improved SAU recovery mode to avoid 0g (Engine Stall) situations.
Implemented common keybind for SPS-141 and ASO countermeasures release.
Fixed engine stop when fuel pumps are off
Fixed all stations firing unguided rockets.
Fixed ASP gunsight for S-24 and Grom payloads.
Fixed canopy lock after refit.
SAU Stabilize mode: implemented hold attitude button & filtered stick inputs.
Corrected several input issues (doubling, incorrectly labeled)
Added multiple joystick axes for custom mapping.
Added high AoA shake (regardless of cockpit shake setting level)
Taxiing and Braking now more restrictive.
Implemented Tyre damage in case of high-speed braking without engaging ABS.
Fixed Landing Lights OFF/ON sharing same keyboard input.
Fixed SPRD-99 Visual Effects.
Fixed missing tooltips.
Fixed incorrect tooltip localization (EN in RU, etc.)
Fixed front SPO-10 coverage area overlap.
Fixed R-60 missiles being torn off their hard-points.
Fixed cockpit lights being stuck in ON or OFF states.
Updated RU, EN, CN, SRB manuals
Fixed Flare drop sound being played without flares being available.
Fixed RSBN Needle Flickering
Fixed incorrect Mach indication.
Fixed side-ways nose-cone movement (introduced in Update #2)
Corrected triple fuel tank (800L + 2x 400L) capability.
Corrected various missions, mission images, and mission text.
Added destroyed “hulk” model and textures.
Temporarily removed Tactical Numbering (pending performance improvement)
Improved various cockpit textures.
Fixed black pylons on outer wing fuel tanks
Update is available now in open-beta.
In the release version it will be available in several days.