systool -m i915 -avModule = "i915"
Attributes:
coresize = "1208320"
initsize = "0"
initstate = "live"
refcnt = "5"
taint = "E"
uevent = <store method only>
Parameters:
disable_display = "N"
disable_power_well = "1"
disable_vtd_wa = "N"
edp_vswing = "0"
enable_cmd_parser = "1"
enable_dc = "-1"
enable_execlists = "0"
enable_fbc = "0"
enable_guc_submission= "N"
enable_hangcheck = "Y"
enable_ips = "1"
enable_ppgtt = "1"
enable_psr = "0"
enable_rc6 = "1"
fastboot = "N"
guc_log_level = "-1"
invert_brightness = "0"
load_detect_test = "N"
lvds_channel_mode = "0"
lvds_use_ssc = "-1"
mmio_debug = "0"
modeset = "-1"
nuclear_pageflip = "N"
panel_ignore_lid = "1"
prefault_disable = "N"
preliminary_hw_support= "0"
reset = "Y"
semaphores = "-1"
use_mmio_flip = "0"
vbt_sdvo_panel_type = "-1"
verbose_state_checks= "Y"
by the way I've upgraded the lib to jessie-backport version :
dpkg -l libdrm* libgl1*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============================-====================-====================-==================================================================
ii libdrm-amdgpu1:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to amdgpu-specific kernel DRM services -- runt
ii libdrm-dev:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to kernel DRM services -- development files
ii libdrm-intel1:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to intel-specific kernel DRM services -- runti
ii libdrm-nouveau2:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to nouveau-specific kernel DRM services -- run
ii libdrm-radeon1:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to radeon-specific kernel DRM services -- runt
ii libdrm2:amd64 2.4.68-1~bpo8+1 amd64 Userspace interface to kernel DRM services -- runtime
un libgl1 <none> <none> (no description available)
ii libgl1-mesa-dev:amd64 11.1.3-1~bpo8+1 amd64 free implementation of the OpenGL API -- GLX development files
ii libgl1-mesa-dri:amd64 11.1.3-1~bpo8+1 amd64 free implementation of the OpenGL API -- DRI modules
un libgl1-mesa-dri-experimental <none> <none> (no description available)
ii libgl1-mesa-glx:amd64 11.1.3-1~bpo8+1 amd64 free implementation of the OpenGL API -- GLX runtime
un libgl1-mesa-swx11 <none> <none> (no description available)
thank you very much