On 08/31/2016 01:18 PM, stan wrote:
> On Wed, 31 Aug 2016 19:25:21 +0100
> Paul Smith <phhs80@xxxxxxxxx> wrote:
>
>> Dear All,
>>
>> I have just bought a monitor, which is detected by Fedora 24 as a
>>
>> Goldstar company Lda 22",
>>
>> but the monitor is a LG of 27".
>>
>> How can this be fixed?
>
> I am not an expert. But this sounds like a faulty EDID, or path to
> read the EDID. Fedora / linux reads the information about the monitor
> directly from the monitor itself. I think this can be overridden by
> putting a configuration file in /etc/X11/xorg.conf.d/ with the
> information needed. A search should turn up samples. Is it possible
> that you already have an override file there, for a 22" Goldstar
> monitor? Or that the connection to the LG is flaky, so the EDID can't
> be read properly?
>
> I vaguely recall that it is possible to dump the EDID into a file, and
> point to it in the kernel start line somehow. Could be a faulty
> memory, though.
Make sure you have the xorg-x11-utils RPM installed, then do
xrandr --prop
In the output, look for something like:
EDID:
00ffffffffffff000469f6270bec0100
1e150103803c22782aeed5a555489b26
125054b7ef00714f81c0814081809500
b300d1c00101023a801871382d40582c
450056502100001e000000ff0042374c
4d54463132353936330a000000fd0032
55185c11000a202020202020000000fc
00415355532056453237380a202001d4
020322714f0102031112130414050e0f
1d1e1f10230907018301000065030c00
10008c0ad08a20e02d10103e96000925
21000018011d007251d01e206e285500
09252100001e011d00bc52d01e20b828
554009252100001e8c0ad09020403120
0c405500092521000018000000000000
00000000000000000000000000000073
relating to the output of your active screen. Copy JUST the hex data to
a temporary file and convert it all to one line. Once you've done that,
then do
edid-decode /path/to/temp/file
and you'll see what the monitor reports itself as. Using the above data,
edid-decode says this about my monitor:
--------------------------- CUT HERE ---------------------------------
[root@prophead ~]# edid-decode /tmp/edid
Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 04 69 f6 27 0b ec 01 00 1e 15
version: 01 03
basic params: 80 3c 22 78 2a
chroma info: ee d5 a5 55 48 9b 26 12 50 54
established: b7 ef 00
standard: 71 4f 81 c0 81 40 81 80 95 00 b3 00 d1 c0 01 01
descriptor 1: 02 3a 80 18 71 38 2d 40 58 2c 45 00 56 50 21 00 00 1e
descriptor 2: 00 00 00 ff 00 42 37 4c 4d 54 46 31 32 35 39 36 33 0a
descriptor 3: 00 00 00 fd 00 32 55 18 5c 11 00 0a 20 20 20 20 20 20
descriptor 4: 00 00 00 fc 00 41 53 55 53 20 56 45 32 37 38 0a 20 20
extensions: 01
checksum: d4
Manufacturer: ACI Model 27f6 Serial Number 125963
Made week 30 of 2011
EDID version: 1.3
Digital display
Maximum image size: 60 cm x 34 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:2:2
First detailed timing is preferred timing
Established timings supported:
720x400@70Hz
640x480@60Hz
640x480@67Hz
640x480@75Hz
800x600@56Hz
800x600@60Hz
800x600@72Hz
800x600@75Hz
832x624@75Hz
1024x768@60Hz
1024x768@70Hz
1024x768@75Hz
1280x1024@75Hz
Standard timings supported:
1152x864@75Hz
1280x720@60Hz
1280x960@60Hz
1280x1024@60Hz
1440x900@60Hz
1680x1050@60Hz
1920x1080@60Hz
Detailed mode: Clock 148.500 MHz, 598 mm x 336 mm
1920 2008 2052 2200 hborder 0
1080 1084 1089 1125 vborder 0
+hsync +vsync
Serial number: B7LMTF125963
Monitor ranges (GTF): 50-85Hz V, 24-92kHz H, max dotclock 170MHz
Monitor name: ASUS
Has 1 extension blocks
Checksum: 0xd4 (valid)
CEA extension block
Extension version: 3
30 bytes of CEA data
Video data block
VIC 01 640x480@60Hz
VIC 02 720x480@60Hz
VIC 03 720x480@60Hz
VIC 17 720x576@50Hz
VIC 18 720x576@50Hz
VIC 19 1280x720@50Hz
VIC 04 1280x720@60Hz
VIC 20 1920x1080i@50Hz
VIC 05 1920x1080i@60Hz
VIC 14 1440x480@60Hz
VIC 15 1440x480@60Hz
VIC 29 1440x576@50Hz
VIC 30 1440x576@50Hz
VIC 31 1920x1080@50Hz
VIC 16 1920x1080@60Hz
Audio data block
Linear PCM, max channels 1
Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16
Speaker allocation data block
Vendor-specific data block, OUI 000c03 (HDMI)
Source physical address 1.0.0.0
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
1 native detailed modes
Detailed mode: Clock 27.000 MHz, 521 mm x 293 mm
720 736 798 858 hborder 0
480 489 495 525 vborder 0
-hsync -vsync
Detailed mode: Clock 74.250 MHz, 521 mm x 293 mm
1280 1390 1430 1650 hborder 0
720 725 730 750 vborder 0
+hsync +vsync
Detailed mode: Clock 74.250 MHz, 521 mm x 293 mm
1280 1720 1760 1980 hborder 0
720 725 730 750 vborder 0
+hsync +vsync
Detailed mode: Clock 27.000 MHz, 521 mm x 293 mm
720 732 796 864 hborder 0
576 581 586 625 vborder 0
-hsync -vsync
Checksum: 0x73 (valid)
EDID block does NOT conform to EDID 1.3!
Detailed block string not properly terminated
--------------------------- CUT HERE ---------------------------------
Hope that helps. Keep in mind that edid-decode can only decode EDID
codes it knows about.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2 ICQ: 226437340 Yahoo: origrps2 -
- -
- To err is human, to moo bovine. -
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