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+---- Thread: Linux Restart Intel gpu-drivers in order to re-enforce handshake with TV (/showthread.php?tid=199553)
Restart Intel gpu-drivers in order to re-enforce handshake with TV - -RobertB- - 2014-07-08
Hi all!
I have recently made the step from using purpose-build IP-TV receivers to XBMC-based receivers. In the the living room, XBMC is running on a Intel i3 4130 x86 which previously served as a server (the HDMI-cable is running through a hole in the ceiling, connecting basement and first floor).
My setup is as follows:
x86-PC (Intel i3 4130, Ubuntu 14.04 64bit, 3.13.0-9, Intel drivers most up-to-date using Intels driver installer, LXDE/Lightdm) -> AVR: Onkyo NR-414 -> TV: LG 55LM760S
Everything is working fine if I first power on the TV and AVR, then the PC. As the PC is supposed to run all the time, I switch off the TV and AVR when I am finished watching TV. Now, if I power on both after some time I only get the connection AVR-TV up and running, but no graphical output from the PC. Restarting the X-Session using "service lightdm restart" does not help. When I "restart" the PC (using ssh), I can see the kernel booting and X-server/XBMC displays just fine.
I already tried certain tweaks like capturing the EDID info "cat /sys/devices/pci0000\:00/0000\:00\:02.0/drm/card0/card0-HDMI-A-2/edid > /lib/firmware/edid/EDID-ONKYO-WITH-TV.BIN" and handing it over using "options drm_kms_helper edid_firmware=HDMI-A-2:edid/EDID-ONKYO-WITH-TV.BIN" in /etc/modprobe.d/drm-kms-helper.conf . I also disconnected the AVR and ran the hdmi cable straight to the TV.
Now, I am looking for something like rmmod i915 && modprobe i915, but the module is reported to be in use. I stopped "service lightdm stop" and also issued "echo 0 > /sys/class/vtconsole/vtcon1/bind" (found it on the web), but still the module is blocked from unloading.
Is there any way to force the driver to start over?
Cheers
Robert
RE: Restart Intel gpu-drivers in order to re-enforce handshake with TV - fritsch - 2014-07-08
Currently not possible, even if EDID overwriting works - you will lose audio (see: http://forum.xbmc.org/showthread.php?tid=174854&pid=1685301#pid1685301). There is a bug filed on https://bugs.freedesktop.org/show_bug.cgi?id=80691
RE: Restart Intel gpu-drivers in order to re-enforce handshake with TV - -RobertB- - 2014-07-08
Thank you for your answer!
Okay, I already found out (the hard way) that pulseaudio will sometimes not recognize the hdmi-audio - but isn't there a way to restart the gpu-driver without restarting the whole system? If this would be possible, I would use the power-key on the remote to power on the avr and tv and restart the gpu-driver - so there would be no need for a edid-hack!?
Cheers
Robert
RE: Restart Intel gpu-drivers in order to re-enforce handshake with TV - a_user - 2014-07-09
Very strange issue you have there.
I have the very same cpu while using ubuntu 13.10, though currently with kernel 3.15.4 and my htpc is more or less on all the time. i never had such an issue like you describe, even not with the original 3.11 kernels nor any other (not 3.12, 3.13, 3.14).
at the moment i am using the drivers and mesa stuff from oibaf's ppa. but i neither had such problems with the orignal ones from ubuntu 13.10.
looks more like an hardware issue with your mainboard.