need help with benq xl2411t EDID problems

Adjusting BENQ Blur Reduction and DyAc (Dynamic Acceleration) including Blur Busters Strobe Utility. Supports most BenQ/Zowie Z-Series monitors (XL2411, XL2420, XL2720, XL2735, XL2540, XL2546)
Post Reply
shuffle
Posts: 12
Joined: 15 Aug 2014, 10:46

need help with benq xl2411t EDID problems

Post by shuffle » 25 May 2020, 13:40

hello

so my benq shows has non pnp display monitor, i alrdy used a custom edid in windows to get full resolution and frequency even though it only works in windows. i want to fix this so i installed linux and used edid-rw and it show me which sector was bad, it seems its only changing 0*29 for 0*d6 but it wont change cause the monitor is protected.

it shows Checksum is bad 0*29 should be 0*d6

anyone knows which pin i need to break? :D

User avatar
Chief Blur Buster
Site Admin
Posts: 7712
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: need help with benq xl2411t EDID problems

Post by Chief Blur Buster » 26 May 2020, 20:05

Moving to BenQ Forum for better response.

My recommendation is to do a Factory Reset on the monitor menus, and see if that fixes the EDID.

Failing that, try to reinstall a firmware upgrade.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

shuffle
Posts: 12
Joined: 15 Aug 2014, 10:46

Re: need help with benq xl2411t EDID problems

Post by shuffle » 27 May 2020, 12:24

ty ofr the replay, i emailed Benq and the first time they send me the EDID for all ports but now that im on Ubuntu i can flash it but it aint working cause the monitor is protected. I ask them if there is something i can do to flash it and they refuse so im on my own.

I can read the data: but cant flash it, this EDID-RW fixes the checksum automatically but either the DVI-D port is connected or the monitor is protected.

00 ff ff ff ff ff ff 00 09 d1 10 7f 45 54 00 00
2a 16 01 03 80 35 1e 78 2e 48 a0 a6 54 54 9f 26
0d 50 54 a5 6b 80 31 68 31 7c 45 68 45 7c 61 68
61 7c 95 3c 01 01 02 3a 80 18 71 38 2d 40 58 7f
45 00 13 2a 21 00 00 1e 00 00 00 ff 00 4d 41 43
30 30 35 34 39 53 4c 30 0a 20 00 00 00 fd 00 38
90 1e a0 21 00 0a 20 20 20 20 20 20 00 00 00 fc
00 42 65 6e 51 20 58 4c 32 34 31 31 54 0a 01 29

02 01 04 00 fe 5b 80 a0 70 38 35 40 30 20 35 00
13 2a 21 00 00 1a 86 6f 80 a0 70 38 40 40 30 20
35 00 13 2a 21 00 00 1a 8a 4d 80 a0 70 38 2c 40
30 20 35 00 13 2b 21 00 00 1a 05 7c 80 58 70 38
12 40 18 20 35 00 13 2b 21 00 00 1e 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e6

----------------

EDID version: 1.3
Manufacturer: BNQ Model 32528 Serial Number 21573
Made in week 42 of 2012
Digital display
Maximum image size: 53 cm x 30 cm
Gamma: 2.20
DPMS levels: Off
RGB color display
Default (sRGB) color space is primary color space
First detailed timing is preferred timing
Color Characteristics
Red: 0.6494, 0.3281
Green: 0.3300, 0.6210
Blue: 0.1503, 0.0527
White: 0.3125, 0.3281
Established Timings I & II
720x400 70.082 Hz 9:5 31.467 kHz 28.320 MHz (IBM)
640x480 59.940 Hz 4:3 31.469 kHz 25.175 MHz (DMT)
640x480 75.000 Hz 4:3 37.500 kHz 31.500 MHz (DMT)
800x600 60.317 Hz 4:3 37.879 kHz 40.000 MHz (DMT)
800x600 75.000 Hz 4:3 46.875 kHz 49.500 MHz (DMT)
832x624 74.551 Hz 4:3 49.726 kHz 57.284 MHz (Apple)
1024x768 60.004 Hz 4:3 48.363 kHz 65.000 MHz (DMT)
1024x768 75.029 Hz 4:3 60.023 kHz 78.750 MHz (DMT)
1280x1024 75.025 Hz 5:4 79.976 kHz 135.000 MHz (DMT)
1152x870 75.062 Hz 192:145 68.681 kHz 100.000 MHz (Apple)
Standard Timings
640x480 100.000 Hz 4:3 50.900 kHz 43.163 MHz (GTF)
640x480 119.999 Hz 4:3 61.800 kHz 52.406 MHz (GTF)
800x600 100.000 Hz 4:3 63.600 kHz 68.179 MHz (GTF)
800x600 120.000 Hz 4:3 77.160 kHz 83.950 MHz (GTF)
1024x768 100.000 Hz 4:3 81.400 kHz 113.309 MHz (GTF)
1024x768 120.000 Hz 4:3 98.760 kHz 139.054 MHz (GTF)
1440x904 120.000 Hz 16:10 116.280 kHz 230.700 MHz (GTF)
Detailed mode: Clock 148.500 MHz, 531 mm x 298 mm
1920 2008 2135 2200 ( 88 127 65)
1080 1084 1089 1125 ( 4 5 36)
+hsync +vsync
VertFreq: 60.000 Hz, HorFreq: 67.500 kHz
Display Product Serial Number: MAC00549SL0
Display Range Limits
Monitor ranges (GTF): 56-144 Hz V, 30-160 kHz H, max dotclock 330 MHz
Display Product Name: BenQ XL2411T
Has 1 extension block
Checksum: 0x29 (should be 0xd6)

----------------

CTA-861 Extension Block Revision 1
0 8-byte timing descriptors
Detailed mode: Clock 235.500 MHz, 531 mm x 298 mm
1920 1968 2000 2080 ( 48 32 80)
1080 1083 1088 1133 ( 3 5 45)
+hsync -vsync
VertFreq: 99.930 Hz, HorFreq: 113.221 kHz
Detailed mode: Clock 285.500 MHz, 531 mm x 298 mm
1920 1968 2000 2080 ( 48 32 80)
1080 1083 1088 1144 ( 3 5 56)
+hsync -vsync
VertFreq: 119.982 Hz, HorFreq: 137.260 kHz
Detailed mode: Clock 198.500 MHz, 531 mm x 299 mm
1920 1968 2000 2080 ( 48 32 80)
1080 1083 1088 1124 ( 3 5 36)
+hsync -vsync
VertFreq: 84.905 Hz, HorFreq: 95.433 kHz
Detailed mode: Clock 317.490 MHz, 531 mm x 299 mm
1920 1944 1976 2008 ( 24 32 32)
1080 1083 1088 1098 ( 3 5 10)
+hsync +vsync
VertFreq: 144.001 Hz, HorFreq: 158.113 kHz
Checksum: 0xe6

User avatar
Chief Blur Buster
Site Admin
Posts: 7712
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: need help with benq xl2411t EDID problems

Post by Chief Blur Buster » 27 May 2020, 12:30

Can't you simply do an EDID override on the Linux side? For Linux, it's called "modelines"

You don't need to flash the EDID if you override instead.

The numbers are very easy to convert into Linux / X modeline strings for lines starting with "Mode".

There are also web-based modeline calculators if you google "modeline calculator" too, which you might find one compatible.

You can also write down the numbers from Windows, and convert them into Linux modelines for all kinds of graphics drivers.

With modelines, you can bypass and override the hardware EDID built into the monitor.

That way, you can get things working without flashing the EDID.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

shuffle
Posts: 12
Joined: 15 Aug 2014, 10:46

Re: need help with benq xl2411t EDID problems

Post by shuffle » 27 May 2020, 12:46

Ty for the reply, the monitor doesn't work in bios or windows, it works only when i install amd drivers and then its all grey out, cant change res etc. Once i EDID override i get my monitor back, all resolutions and 144hz.

I need to update drivers? back to edid override and now windows has signature protection more work to do. i just want my monitor to work.

User avatar
Chief Blur Buster
Site Admin
Posts: 7712
Joined: 05 Dec 2013, 15:44
Location: Toronto, Ontario, Canada
Contact:

Re: need help with benq xl2411t EDID problems

Post by Chief Blur Buster » 27 May 2020, 12:59

shuffle wrote:
27 May 2020, 12:46
Ty for the reply, the monitor doesn't work in bios or windows, it works only when i install amd drivers and then its all grey out, cant change res etc. Once i EDID override i get my monitor back, all resolutions and 144hz.

I need to update drivers? back to edid override and now windows has signature protection more work to do. i just want my monitor to work.
If the EDID is damaged and cannot be modified, this is a warranty claim. If the monitor is out of warranty, I'm not sure what the solution is. I'll have to see if different users are able to advise you.

It also pre-dates the XL2411Z (where there is a DIY Firmware Upgarde), so reinstalling a firmware upgrade may not even work.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors

shuffle
Posts: 12
Joined: 15 Aug 2014, 10:46

Re: need help with benq xl2411t EDID problems

Post by shuffle » 02 Jun 2020, 06:58

I manage to flash the edid, funny story, power went off in my house cause of storm and then next day DVI port was working, it seems i had to turn off the power from the monitor after flashing.

Benq xl2411t has no eprom protection, you can flash it ez with edid-rw

Post Reply