Re: Intel graphics drm issue?
From: Mark Hounschell
Date: Sat Oct 13 2012 - 15:17:41 EST
On 10/13/2012 02:57 PM, Mark Hounschell wrote:
Hi Bruno,
Thanks for the response.
On 10/12/2012 05:14 PM, Bruno PrÃmont wrote:
Hi Mark,
[CCing intel-gfx]
On Fri, 12 October 2012 Mark Hounschell <markh@xxxxxxxxxx> wrote:
Not sure this is the correct place to ask about a possible drm issue. I
have an intel based PC with an HDMI port that I'm trying to connect to
an LG TV. I have successfully used this HDMI port connected to an Optima
projector. Using that projector, everything from the BIOS post, BIOS
configuration, and all the way up to a graphical login worked just fine.
The same HDMI port and cable connected to this TV gives me the below
messages during boot. I also get no BIOS post or BIOS configuration
output while in the BIOS. I have a monitor connected to the DVI port so
I can see what I should see on the TV there, just as when I was
connected to the Optima projector. That alone makes me pretty sure it's
not a kernel issue but here are the messages anyway. Maybe they will
give someone a hint as to what the problem may be, in the case they
might be willing to give me any pointers.
TV - LG 42lb9df
PC - intel DH77DF motherboard
[ 0.000000] Linux version 3.4.10-lcrs (root@geexbox) (gcc version
4.7.1 20120723 [gcc-4_7-branch revision 189773] (SUSE Linux) ) #1 SMP
PREEMPT Wed Oct 10 16:16:16 EDT 2012
...
[ 1.897955] [drm] MTRR allocation failed. Graphics performance may
suffer.
[ 1.898045] i915 0000:00:02.0: irq 43 for MSI/MSI-X
[ 1.898050] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[ 1.898051] [drm] Driver supports precise vblank timestamp query.
[ 1.898084] [drm:intel_dsm_platform_mux_info] *ERROR* MUX INFO call
failed
[ 1.898737] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 1.995523] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off
[ 2.299535] [drm:drm_edid_block_valid] *ERROR* EDID checksum is
invalid, remainder is 128
[ 2.299865] Raw EDID:
[ 2.299957] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.300188] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.300418] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.300648] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.300879] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.301109] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.301339] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 2.301569] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
This looks like your LG TV either does not provide EDID information via HDMI
connector, or otherwise behaves in a special way which makes reading EDID
fail.
Did you try the TV on some other computer to check if EDID can be read there
(e.g. with nvidia/amd GPU and matching open/closed driver)?
Also make sure the TV is on (neither off nor on stand-by) as some TVs
disable too much of connector interface in those states.
I have another AMD based PC here with an nvidia card and HDMI port. Using
the nvidia driver, it boots up with no output to the tv until X starts.
Once X starts I get my kdm login screen. All is well except the resolution
is 800x600 and I have no VTs. I suspect if I had a properly configured
xorg.conf file, my resolution would be what I defined in it and work.
Using the nouveau driver, I get nothing but "no signal" on the tv. Just
like the the intel box, except no EDID messages in the log file. I've
attached a dmesg outputs for each config.
Back on the Intel machine. I boot up with a normal monitor connected to the
DVI port of the PC. Then at the kdm login screen, I disconnect the DVI
cable from the PC and connect the TV to the PCs DVI port using a DVI/HDMI
adapter. I get a beautiful 1600x1200 resolution screen on the TV. This does
not happen using the PC HDMI port.
One other thing I failed to mention. If i connect the TV HDMI to the Intel
boards DVI port using the adapter, at power up I get all the BIOS messages
and can enter the BIOS and all is fine. But when I let it boot all the way
up like this, I get nothing but "no signal" after leaving BIOS mode.
Turning the tv on/off, cable plug/unplug does not help.
Mark
I have no control over the tv with regards to stand-by mode. Off is standby
mode, on is on.
[ 2.434378] i915 0000:00:02.0: HDMI-A-3: EDID block 0 invalid.
[ 2.477539] checking generic (e0000000 3ff0000) vs hw (e0000000
10000000)
[ 2.477541] fb: conflicting fb hw usage inteldrmfb vs VESA VGA -
removing generic driver
[ 2.477549] Console: switching to colour dummy device 80x25
[ 2.477831] fbcon: inteldrmfb (fb0) is primary device
[ 2.637915] Console: switching to colour frame buffer device 128x48
[ 2.679625] fb0: inteldrmfb frame buffer device
[ 2.679626] drm: registered panic notifier
[ 2.691536] acpi device:4b: registered as cooling_device9
[ 2.691660] input: Video Bus as
/devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:00/input/input4
[ 2.691698] ACPI: Video Device [GFX0] (multi-head: yes rom: no
post: no)
[ 2.691709] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on
minor 0
geexbox:/home/mplayer # lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
processor DRAM Controller (rev 09)
...
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd
Gen Core processor Graphics Controller (rev 09)
...
Note, usually `lspci -nn` is more informative as it also provides
vendor/device
IDs in addition to nice names.
# lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
processor DRAM Controller [8086:0150] (rev 09)
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core
processor PCI Express Root Port [8086:0151] (rev 09)
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200
v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09)
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series
Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210
Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
00:19.0 Ethernet controller [0200]: Intel Corporation 82579V Gigabit
Network Connection [8086:1503] (rev 04)
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series
Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset
Family PCI Express Root Port 1 [8086:1e10] (rev c4)
00:1c.7 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset
Family PCI Express Root Port 8 [8086:1e1e] (rev c4)
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series
Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04)
00:1f.0 ISA bridge [0601]: Intel Corporation H77 Express Chipset LPC
Controller [8086:1e4a] (rev 04)
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series/C210 Series
Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e02] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family
SMBus Controller [8086:1e22] (rev 04)
01:00.0 PCI bridge [0604]: PLX Technology, Inc. PEX8112 x1 Lane PCI
Express-to-PCI Bridge [10b5:8112] (rev aa)
02:04.0 Multimedia audio controller [0401]: C-Media Electronics Inc CMI8788
[Oxygen HD Audio] [13f6:8788]
I can do more to help if asked.
Regards
Mark
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