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198.8.4.24
In Reply to: RE: 12. [New] Further culling of Windows using AutoRuns posted by cics on May 30, 2007 at 09:26:56
I basically screwed myself up. Without have a system backup, I disabled vgasave in device manager and autoruns with my video card disabled. now I can't get any video at all. I've read some threads about how to fix this, but so far my system isn't allowing me to boot to a cd, so that is killing my hopes of recovering so far. All I have to do is type in a command to reset the registry value. I just need something that will let me see what I'm doing or bypass the windows startup, which is when my screen goes blank. Looks like i might be putting together a new pc a lot sooner than I thought.
Follow Ups:
Just after BIOS initial screens and before Windows splash screen, press F8 a few times. Windows should present a menu on how to startup - choose first option: Safe Mode. Once Windows starts up, it prompts you to continue with Safe Mode - answer Yes. Enable device and reboot.
I'm assuming you still have VGA enabled in BIOS - you should see initial BIOS intialization screens before Windows. If not, VGA in BIOS may be disabled.
Sadly, I tried that already, but safe mode also does not give me any video either. Searches on the web confirmed this is the case.
I also tried output ing the vgasave portion of the registry from another pc to a registry file and tried to boot up and run it on my pc by memorizing the keystrokes to run it off a usb pen drive. Didn't work, but since I can't see it's hard to say if I did it right.
this shows how to fix it:
http://www.ryanlowe.ca/blog/archives/001050_adventures_in_disabling_vgasave.php
but I'm also having trouble getting my pc to boot using the dvd drive first, and that may be becuase I have disabled the ide device in the device manager as well. I don't think that should be required though. i also don't have the windows xp restore or installation cd, so that's the only thing I can think of that would work at this point. I may ask for your recommendation for a reasonably priced pc case and power supply in a week or two if I give up.
Try booting off USB Flash - see link below.
My Dell PC doesn't have a normal CD-ROM Drive. BIOS will not boot of installed DVD ROM Drive. So USB may be a good way to go - but make sure your BIOS allows for this.
Another way is to remove your boot drive and install it into a working PC. PC boots on its normal drive but will recognize second drive which you can access and apply fixes or backup data etc.
oops, tryed in the wrong username last time...
Anyway, I did hook up my boot drive in another pc, but I'm not sure how to edit the registry when it's not the booted hard drive. When I ran autoruns on that hard drive it gave the configuration of the booted drive, so everything was already checked.
I don't know how to change the registry on a secondary drive (not the boot drive).
I don't know if I can get into the device manager either, or whether a registry change alone will fix it.
Plus I have 2 hard drives w/ raid that I boot with, so whatever the solution is, I may have to do it to both separately.
I think the regestry location is:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VgaSave]
and
"Start"=dword:00000001
This may take a while and I don't want it clogging the thread. I'd do the usb OS change, but I don't know anyone with an XP disk. My dell didn't even come with one.
If you think you can help, email me at texastea006@yahoo.com.
Thats good news - I wouldn't worry about a USB flash drive.
Two options:
1. [safest] What I had in mind is to create a .bat file that you store in startup directory (C:\Documents and Settings\All Users\Start Menu\Programs\Startup). This .bat would contain instructions to enable vgasave. Command is 'REG ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VgaSave /v Start /t REG_DWORD /d 01'
2. [risky - not recommended] Look in ?:\WINDOWS\system32\config - this is where registry data is stored. HKEY_LOCAL_MACHINE\SYSTEM stuff is located in 'system' file. Restore a backup version of 'system' file.
Reinstall boot drive into Dell. On first reboot device sets to enabled but Windows needs a reboot - of course you won't see any of this. But after a few minutes, a second reboot should get you going.
Following the instructions on step one, I created a batch file (I used the command without the single quotations) and added them to the startup directory of each of my two raided boot drives, using another computer to load the drives. Then, with everything back in place, I restarted my media pc. I waited a bit and then rebooted. However, I still lost video during the WIndows XP flash screen. for some reason, the vgasave service still is not starting. I wonder if I have to have the batch file overwrite the entire vgasave area, which includes several lines.
Then I got a copy of the Dell support disk and ran the recovery console.
folowing the instructions form the web, I entered: 'enable vgasave SERVICE_SYSTEM_START'
then it told me the service was already set to that.
now i'm looking on the web for a command to start my display adapter, which is also disabled. I hope that will get me some where.Do you think there is a command I can enter in a batch file from my startup folder that will attempt to start my display adapter?instead of just changing one resistry value? Or maybe load the driver manually?
I think you're using a display card - try removing it and connect directly to mobo vga/dvi.
ok, IT'S FIXED. i was able to use another pc to blindly mimic the keystrokes necessary to enable my display adapter.
My previous attempts to change device manager were not working becuase the last step had a dialog box i was not aware of that asked if I really wanted to enable the device. oops.
once, the video came up, I saw the batch file you helped me build output on the screen, and it was asking me to say yes, that I really wanted to make the registry change for vgasave. so that wouldn't work without that final step.
Anyway, my rear end has been saved, and hopefully I won't change anything else unless I know you or someone else has safely tried it.
Whew!!! Thanks for your help[ though.
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