Dear Great Knowledgeable Ones,
I have a peculiar issue attempting to run an external CRT monitor on VGA at 1600x1200@85Hz with an integrated HD4200 on Win8.1 x64. The monitor's capabilities appear to be correctly recognised but Windows will not countenance running it higher than 1280x1024. Having (eventually) found the Intel custom resolutions programme I can now force 1440x1050@75Hz or 1600x1200@60Hz (the latter obviously unworkable on a CRT) perfectly happily, but attempting to enter 1600x1200 @ 85Hz or 75Hz generates the error "The custom resolution exceeds the maximum bandwidth capacity."
This is obviously strange since not only was this perfectly normal circa 18 years ago, but this also worked fine on an older laptop with win7 x64 and i5 3210M (with Intel graphics). I do not know where to look to find out what is bandwidth-limited and why, and it would be odd if newer graphics processors couldn't cope with this. Nothing in the specifications on Toshiba's website warns of it that I could find; indeed, the only thing Toshiba says about VGA is that there is one - a clear slur to the quite literally billions of us running 15 year old monitors on a daily basis.
Sadly I cannot revert to using my old laptop since it was lost when some friendly recent arrivals from overseas accidentally entered through the window of my flat, obviously believing it to be their own, and accidentally picked up my laptop on the way out when I asked of their intentions. Clearly the incident was so mortally embarrassing that they couldn't face returning it, hence the short upgrade cycle and therefore why I would like this to work.
Many thanks,
Simon
Details:
...and before you ask, those drivers are the newest that Toshiba has on their website and Windows didn't want to update anything when attempting to install drivers from a .zip as per here:
Desktop graphics drivers — How to Manually Install a Driver in Microsoft Windows 8* or Windows 8.1*
Old laptop: Toshiba Satellite Pro L850-1DV, Core i5 3210M
New laptop: Toshiba Satellite C55-A-1N4, Core i5 4200M
Monitor: Mitsubishi Diamond Plus 220
Displays are set to extended, 1366x768@60Hz inbuilt LCD, 1440x1050@75Hz CRT.
Intel driver information:
Intel(R) HD Graphics 4600
Report Date: 11/3/2014
Report Time[hh:mm:ss]: 14:25:11
Driver Version: 10.18.10.3308
Operating System: Microsoft Windows 8.1(6.3.9600)
Default Language: English (United Kingdom)
Installed DirectX* Version: 11.2
Supported DirectX* Version: 11.0
Shader Version: 5.0
OpenGL* Version: 4.2
OpenCL* Version: 1.2
Physical Memory: 4008 MB
Processor: Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz
Processor Speed: 2494 MHz
Vendor ID: 8086
Device ID: 0416
Device Revision: 06
* Processor Graphics Information *
Processor Graphics in Use: Intel(R) HD Graphics 4600
GOP Version: 5.0.1025
Current Graphics Mode: 1366 by 768
* Devices Connected to the Graphics Accelerator *
Active Monitors: 1
Active Notebook Displays: 1
* Monitor *
Monitor Name: Generic PnP Monitor
Display Type: Analog
Connector Type: VGA
Serial Number: MEL4480
Gamma: 2.2
DDC2 Protocol: Supported
Device Type: Monitor
Maximum Image Size:
Horizontal: 15.75 inches
Vertical: 11.81 inches
Monitor Supported Modes:
640 by 480 (60 Hz)
640 by 480 (72 Hz)
640 by 480 (67 Hz)
640 by 480 (75 Hz)
720 by 400 (88 Hz)
720 by 400 (70 Hz)
800 by 600 (75 Hz)
800 by 600 (85 Hz)
800 by 600 (72 Hz)
800 by 600 (56 Hz)
800 by 600 (60 Hz)
832 by 624 (75 Hz)
1024 by 768 (75 Hz)
1024 by 768 (85 Hz)
1024 by 768 (87 Hz)
1024 by 768 (60 Hz)
1024 by 768 (70 Hz)
1152 by 864 (75 Hz)
1152 by 870 (75 Hz)
1280 by 1024 (85 Hz)
1280 by 1024 (75 Hz)
1600 by 1200 (85 Hz)
1600 by 1200 (75 Hz)
1792 by 1344 (75 Hz)
1800 by 1440 (70 Hz)
1920 by 1440 (73 Hz)
Display Power Management Support:
Standby Mode: Supported
Suspend Mode: Supported
Active Off Mode: Supported
Raw EDID:
00 FF FF FF FF FF FF 00 34 AC 80 44 61 11 00 00
02 0B 01 02 0C 28 1E 78 E9 9C 68 A0 57 4A 9B 26
12 48 4C FF FF 80 45 59 61 59 71 4F 81 99 A9 4F
C1 4F C2 8A D1 4D A6 59 40 30 62 B0 32 40 40 C0
13 00 8C 29 11 00 00 1E 00 00 00 FD 00 32 A0 1E
6E 21 00 0A 20 20 20 20 20 20 00 00 00 FC 00 4E
53 56 31 31 30 37 4B 0A 20 20 20 20 00 00 00 FF
00 31 30 31 33 30 34 34 34 39 0A 20 20 20 00 6B
* Built-in Display *
Monitor Name: Generic PnP Monitor
Display Type: Digital
Connector Type: Embedded DisplayPort
Serial Number: SDC4347
Gamma: 2.2
DDC2 Protocol: Supported
Device Type: Built-in Display
Maximum Image Size:
Horizontal: 13.39 inches
Vertical: 07.48 inches
Monitor Supported Modes:
1366 by 768 (60 Hz)
Display Power Management Support:
Standby Mode: Not Supported
Suspend Mode: Not Supported
Active Off Mode: Not Supported
Raw EDID:
00 FF FF FF FF FF FF 00 4C 83 47 43 00 00 00 00
00 16 01 03 80 22 13 78 0A 8D A5 9D 5B 55 9C 26
19 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 41 1C 56 A0 50 00 16 30 30 20
25 00 58 C1 10 00 00 19 00 00 00 0F 00 00 00 00
00 00 00 00 00 1E B4 02 15 00 00 00 00 FE 00 53
41 4D 53 55 4E 47 0A 20 20 20 20 20 00 00 00 FE
00 31 35 36 41 54 33 32 2D 54 30 31 0A 20 00 50
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