Package: edid-decode
Version: 0.1~git20191108.3a6108a75be356-1
Severity: wishlist
Dear Maintainer,
I was trying to validate the EDID table of an HDMI device.
The data were incorrect (the device also wasn't recognized correctly) and when
given to edid-decode to analyze the table the program is killed by SIGFPE
caused by a division-by-zero:
$ edid-decode edid
Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 00 00 00 00 00 00 00 00 01 0c
version: 01 03
basic params: 80 50 2d 78 0a
chroma info: 0d c9 a0 57 47 98 27 12 48 4c
established: 20 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: 02 3a 80 18 71 38 2d 40 58 2c 45 00 dc 0b 11 00 00 1e
descriptor 2: 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 58 c2 21 00 00 18
descriptor 3: 00 00 00 7c 00 4d 59 20 48 44 54 56 0a 20 20 20 20 20
descriptor 4: 00 00 00 00 00 00 00 0a 2e 06 00 0a 20 20 20 20 20 20
extensions: 01
checksum: 75
EDID version: 1.3
Manufacturer: @@@ Model 0 Serial Number 0
Digital display
Maximum image size: 80 cm x 45 cm
Gamma: 2.20
RGB color display
First detailed timing is preferred timing
Display x,y Chromaticity:
Red: 0.6250, 0.3398
Green: 0.2802, 0.5947
Blue: 0.1552, 0.0703
White: 0.2832, 0.2978
Established timings supported:
640x480@60Hz 4:3 HorFreq: 31469 Hz Clock: 25.175 MHz
Standard timings supported:
Detailed mode: Clock 148.500 MHz, 476 mm x 267 mm
1920 2008 2052 2200 hborder 0
1080 1084 1089 1125 vborder 0
+hsync +vsync
VertFreq: 60 Hz, HorFreq: 67500 Hz
Detailed mode: Clock 27.000 MHz, 600 mm x 450 mm
720 736 798 858 hborder 0
480 489 495 525 vborder 0
-hsync -vsync
VertFreq: 59 Hz, HorFreq: 31468 Hz
Unknown monitor description type 124
Manufacturer-specified data, tag 0
Has 1 extension blocks
Checksum: 0x75 (valid)
CTA extension block
Extension version: 3
26 bytes of CTA data
Speaker allocation data block
Speaker map:
FL/FR - Front Left/Right
LFE - Low Frequency Effects
FC - Front Center
BL/BR - Back Left/Right
BC - Back Center
FLC/FRC - Front Left/Right of Center
RLC/RRC - Rear Left/Right of Center
SiL/SiR - Side Left/Right
TpBL/TpBR - Top Back Left/Right
BtFL/BtBR - Bottom Front Left/Right
Video data block
Video data block
VIC 16 1920x1080@60Hz 16:9 HorFreq: 67500 Hz Clock: 148.500 MHz
VIC 5 1920x1080i@60Hz 16:9 HorFreq: 33750 Hz Clock: 74.250 MHz
VIC 4 1280x720@60Hz 16:9 HorFreq: 45000 Hz Clock: 74.250 MHz
VIC 1 640x480@60Hz 4:3 HorFreq: 31469 Hz Clock: 25.175 MHz
VIC 2 720x480@60Hz 4:3 HorFreq: 31469 Hz Clock: 27.000 MHz
VIC 6 1440x480i@60Hz 4:3 HorFreq: 15734 Hz Clock: 27.000 MHz
VIC 21 1440x576i@50Hz 4:3 HorFreq: 15625 Hz Clock: 27.000 MHz
VIC 17 720x576@50Hz 4:3 HorFreq: 31250 Hz Clock: 27.000 MHz
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Unknown tag 0, length 0 (raw 00)
Basic audio support
0 native detailed modes
Detailed mode: Clock 82.240 MHz, 544 mm x 32 mm
32 32 554 64 hborder 32
3840 3842 3842 7680 vborder 32
-hsync -vsync analog composite field sequential L/R
VertFreq: 167 Hz, HorFreq: 1285000 Hz
Detailed mode: Clock 82.240 MHz, 544 mm x 32 mm
32 32 554 64 hborder 32
256 258 258 3072 vborder 32
-hsync -vsync analog composite field sequential L/R
VertFreq: 418 Hz, HorFreq: 1285000 Hz
Floating point exception
I would expect a sensible error message.
Please note that the table is handled by the current upstream verison of the
edid-decode, which can parse the data and give the error in this case:
...
Invalid Detailed Timings:
Horizontal Active/Blanking 32/32
Vertical Active/Blanking 0/0
Checksum: 0xd8 (valid)
----------------
EDID block does NOT conform to EDID 1.3!
Missing name descriptor
Missing monitor ranges
EDID block does not conform:
Bad year of manufacture
Detailed blocks filled with garbage
Manufacturer name field contains garbage
Vendor & Product Identification: Invalid year
Regards,
Alex
-- System Information:
Debian Release: 10.1
APT prefers proposed-updates
APT policy: (500, 'proposed-updates'), (500, 'oldstable-debug'), (500,
'oldoldstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.3.7 (SMP w/8 CPU cores; PREEMPT)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US:en
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages edid-decode depends on:
ii libc6 2.28-10
edid-decode recommends no packages.
edid-decode suggests no packages.
-- no debconf information
