VirtualBox 5.2.0 VM screen cropped
VirtualBox 5.2.0 VM screen cropped
Hi, I have compiled VirtualBox 5.2.0 from source code using instructions from viewtopic.php?f=10&t=83521, and when I try to run my Windows 98 SE VM it gives me something like zoomed display but the display is cropped. I didn't make any changes to the source code tree except configure file that I followed through the linked thread. The VM is fine when I run using the prebuilt VirtualBox in the Downloads page.
The screenshot is attached below. The screenshot took from a MacBook Pro Retina Mid-2015, running Mac OS X 10.12.2 Sierra.
The screenshot is attached below. The screenshot took from a MacBook Pro Retina Mid-2015, running Mac OS X 10.12.2 Sierra.
- Attachments
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- win98se.jpeg.zip
- Screenshot (sorry had to zip it, the file is too large)
- (118.81 KiB) Downloaded 76 times
Last edited by socratis on 17. Nov 2017, 19:22, edited 1 time in total.
Reason: Fixed obfuscated URLs.
Reason: Fixed obfuscated URLs.
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Re: VirtualBox 5.2.0 VM screen cropped
Have you any evidence that the same VM looks right when using the official release of VirtualBox for OS X hosts?
To me it just looks like an incorrect 16-color VESA video mode has been selected in the guest OS. What display drivers did you install in the latter? Typically you have to install either the BearWindows or SciTech drivers, as the default VGA driver is not much good if you want to go above 800x600 (if it even supports that - it may be 640x480).
To me it just looks like an incorrect 16-color VESA video mode has been selected in the guest OS. What display drivers did you install in the latter? Typically you have to install either the BearWindows or SciTech drivers, as the default VGA driver is not much good if you want to go above 800x600 (if it even supports that - it may be 640x480).
Re: VirtualBox 5.2.0 VM screen cropped
Yes, attached one here below is the screenshot from the prebuilt version of VirtualBox 5.2.0. Same VM, no driver changes or anything.
EDIT: No display drivers installed in the VM.
EDIT: No display drivers installed in the VM.
- Attachments
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- win98se_prebuiltvbox.jpeg.zip
- Screenshot from prebuilt VirtualBox
- (249.54 KiB) Downloaded 55 times
Last edited by socratis on 17. Nov 2017, 19:23, edited 1 time in total.
Reason: Removed unnecessary verbatim quote of the whole previous message.
Reason: Removed unnecessary verbatim quote of the whole previous message.
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Re: VirtualBox 5.2.0 VM screen cropped
Please provide a VM log file. With the VM fully shut down, right click it in the GUI. Select "Show Log" and save "VBox.log" (ONLY) to a zip file. Attach the zip here.
Re: VirtualBox 5.2.0 VM screen cropped
Here are the log files for the 2 different versions. I also added another screenshot as a preview what the display looks like.
- Attachments
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- win98se_ose.jpeg.zip
- Screenshot
- (46.49 KiB) Downloaded 37 times
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- Win98SE-2017-11-14-17-32-26-ose.log.zip
- VirtualBox 5.2.0 ose version compiled
- (20.72 KiB) Downloaded 50 times
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- Win98SE-2017-11-14-17-29-24-prebuilt.log.zip
- VirtualBox 5.2.0 prebuilt version
- (20.85 KiB) Downloaded 42 times
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Re: VirtualBox 5.2.0 VM screen cropped
I don't see any important difference in the VMs, so I have to fall back on my previous assessment: it simply looks as if you have an incorrect display size selected in one VM. I don't know why that would be. Presumably it's because of some virtual hardware difference in the default VM in your build.
BTW, you should go ahead and install the BearWindows VESA driver discussed in the tutorials. I don't see any point it crippling performance even more by using a 16 color dsplay mode on a 32bpp host.
BTW, you should go ahead and install the BearWindows VESA driver discussed in the tutorials. I don't see any point it crippling performance even more by using a 16 color dsplay mode on a 32bpp host.
Re: VirtualBox 5.2.0 VM screen cropped
I have installed SciTech Display Doctor 7 and changed the screen resolution to 1024x768 at 32 bpp. And the problem still appear on the self-compiled version of VirtualBox.
- Attachments
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- Screen Shot 2017-11-15 at 2.42.00 PM.jpg.zip
- Screenshot of self-compiled VM
- (109.07 KiB) Downloaded 45 times
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- Win98SE-2017-11-15-14-50-23.log.zip
- Self-compiled VM log file
- (25.7 KiB) Downloaded 41 times
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- Win98SE-2017-11-15-14-56-12-prebuilt.log.zip
- Prebuilt VM log file
- (21.34 KiB) Downloaded 45 times
Re: VirtualBox 5.2.0 VM screen cropped
And here is the screenshot for the prebuilt VM.
- Attachments
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- Screen Shot 2017-11-15 at 2.55.15 PM.jpg.zip
- Screenshot
- (200.13 KiB) Downloaded 58 times
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Re: VirtualBox 5.2.0 VM screen cropped
I should better point out that if you choose to recompile the sources then you're technically on your own. Only the prebuilt versions are supported.
That said, looking at the screenshot I see repeated lines, and possibly there is repeated pixels on a line. I'd be looking at build options in the display adapter, particularly regarding default bpp values and timing.
Additional note: the desktop background appears to be dithered, most peculiar in a 32bpp image. It's hard to tell when JPEG has been used, but the pattern seems to be 2x2 tiles, possibly supporting the idea that pixels are being double. I would hope that scale mode in the VM is disabled?
That said, looking at the screenshot I see repeated lines, and possibly there is repeated pixels on a line. I'd be looking at build options in the display adapter, particularly regarding default bpp values and timing.
Additional note: the desktop background appears to be dithered, most peculiar in a 32bpp image. It's hard to tell when JPEG has been used, but the pattern seems to be 2x2 tiles, possibly supporting the idea that pixels are being double. I would hope that scale mode in the VM is disabled?
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Re: VirtualBox 5.2.0 VM screen cropped
It might be related to the Qt library that the OSE version was built with.
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Re: VirtualBox 5.2.0 VM screen cropped
Perhaps, though I don't see how Qt can influence the contents of a guest desktop, unless perhaps scale mode is enabled.
Re: VirtualBox 5.2.0 VM screen cropped
Yes, scale mode is disabled in the VM.mpack wrote:I should better point out that if you choose to recompile the sources then you're technically on your own. Only the prebuilt versions are supported.
That said, looking at the screenshot I see repeated lines, and possibly there is repeated pixels on a line. I'd be looking at build options in the display adapter, particularly regarding default bpp values and timing.
Additional note: the desktop background appears to be dithered, most peculiar in a 32bpp image. It's hard to tell when JPEG has been used, but the pattern seems to be 2x2 tiles, possibly supporting the idea that pixels are being double. I would hope that scale mode in the VM is disabled?