Problem: How to reduce display size in Xorg

I am really stuck at this. The problem is as follows:
I have a DIY projector which uses a 17'' 1280x1024 LCD (Samsung 740n). Due to some technicalities the top and bottom 100px of the display are mostly unusable and I have covered them in isolation tape so that stray light cannot pass. I want to configure X to use only 720px vertical (1280x720) without changing the resolution (it must stay 1280x1024, otherwise the LCD will expand it to fit the whole screen).
Graphically presented it would look something like this:
XXXXXXXXXXX
OOOOOOOOOO
OOOOOOOOOO
OOOOOOOOOO
XXXXXXXXXXX
Xs are unused space (black bars)
Os are usable display space (1280x720)
Any ideas would be greatly appreciated, thanks!
Last edited by nlight (2009-09-03 12:04:28)

B wrote:DId you take a look at Xrandr?
Yes. The LCD will stretch everything you give it that's not 4:3, that sucks.
Sophotect wrote:..
Virtual 1280 720
Was the first thing I tried, actually. It doesn't really work, I tried it with several other options. It either stretched the picture or did nothing. I think the only possible way to do it would be to send a 1280x1024 to the videocard and fooling X into thinking its usable desktop size is 1280x720. I don't know if this makes any sense whatsoever, I'm not really familiar on how X interacts with the hardware.

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store under control. Of course, users cannot deny installing security updates and leave their system open to security holes. What they can do is install less optional updates, the ones that Microsoft releases on the fourth Tuesday of every month and also install
less of the hotfixes that are available by request from a Knowledge Base article. In short, you have to trade the number of bugs fixed in the OS by installing hotfixes at the cost of enormous amounts of disk space. The whole servicing stack is a total downgrade
to Windows XP's update.exe method. It causes heavy disk thrashing and slow logoffs/logons while Windows configures these updates at the Welcome Screen. Many systems are unable to boot because of failed updates. Another disadvantage of the "new" servicing stack
(and the redesigned Setup mechanism of Windows Vista) is the inability to do a true slipstream of service packs and hotfixes.
The time it takes to actually install these hotfixes online compared to Windows XP is also completely unacceptable. When you start installing an MSU update, it spends a lot of time determining whether the update applies to your system. Then, the update itself
takes much longer to install compared to Windows XP's Update.exe (hours instead of minutes if you are installing dozens of updates through a script). Finally, that post-installation process ("Configuring updates... Do not turn off your computer") takes several
minutes before shut down followed by a second post-installation process (configuration) upon restart before logon that also takes also several minutes and thrashes the disk.
I can install the entire SP3 for Windows XP in about 10 minutes after downloading the full installer. I can also install a slipstreamed-with-SP3 copy of Windows XP is about 45 minutes on a modern fast PC. In contrast, Windows Vista or Windows 7 do install
relatively quickly (in just about 15-20 minutes) on a modern PC but installing the service packs and updates takes more time than anything on XP did. Not only can service packs not be slipstreamed, but Vista Service Packs are not even cumulative, which means
if you clean install Windows Vista today, you have to install SP1 first which takes about 90 minutes, then SP2 which takes less time, then all the post-SP2 updates which do take hours to install. If you really HAVE to use Windows 7 or Windows Vista, you are
stuck with this slow update non-sense as Microsoft does not even acknowledge that there is any slowdown or loss of functionality in the new servicing mechanism. The fact remains: MSU updates are slow as **** and take too much time and as Windows 7/Vista get
older and Microsoft stops producing service packs, a clean install is going to take longer and longer to bring it up-to-date with all patches installed. Is is worth wasting your time on an OS whose servicing mechanism Microsoft completely screwed up? I once
again recommend you read more about the servicing stack and how it operates at The Servicing Guy's blog:http://blogs.technet.com/b/joscon/. To fix this messed up servicing stack, Microsoft also offers a tool
called CheckSUR for your system if it finds “inconsistencies in the servicing store”.
Microsoft's Windows Vista and Windows 7 products are not engineered with disk space in mind. It causes a problem, especially for SSDs which are still low capacity and very expensive. The only hope is that Microsoft again completely redesigns this servicing
mechanism in a future Windows release so it would not cause this growing disk space consumption issue, speed up installation of updates by an order of magnitude, not slow down logon and logoff, not prevent systems becoming unusable because of failed updates
being stuck at a particular stage and allow true slipstreaming.
Microsoft's response to this is vague - they simply state "Windows 7's servicing is more reliable than Windows XP" but they cannot acknowledge it is a million times slower and still unreliable...slow to the point of being unusable and sometimes leaving systems
in an unbootable damaged state. Of course they know all this too but can't admit it since it makes their latest OSes look poor. Moving from a very simple and fast update mechanism that worked to a complex one that requires endless “configuring” and repair
through CheckSUR is a product engineering defect.
Take a look at servicing-related complaints in Microsoft's own forums:
1.
Very slow install of updates to Windows 7
2.
Windows 7 - Updates are very slow
3.
Windows 7 Ultimate, it takes long time configuring updates
4.
"Preparing To Configure Windows. Please Do Not Turn Off Your Computer"
5.
Very slow update install at shutdown (Windows 7 Home Premium)
6.
Why does my computer run so slow when installing updates?
7.
Every time the computer is shut down, it always says installing update do not turn off your computer
8.
Computer is working slow and wants to do windows updates all the time
9.
Windows 7 Update install time taking a very long time
10.
Windows wants to install 6 updates every time I log off or put the computer in sleep mode
11.
Problem In Configuring Windows Updates at the time of Startup
12.
Computer really slow after latest updates
13.
Windows hangs up in "configuring updates"
14.
Why can't windows 7 install updates?
15.
Every time computer is shut down, receive Installing updates, do not shut off....
16.
How long does it take for the Windows 7 Home Premium updates take?
17.
Windows 7 "Installing Update 2 of 2" for 12 hours now
18.
Updates causes endless reboots
19.
Updates stuck installing for over 24 hrs. Computer does not boot
20.
Cannot load Windows 7 after installing 2 critical updates
A proper solution to this problem would be to completely re-engineer and rewrite the servicing mechanism so it operates with the speed, reliability and pain-free operation of the XP servicing mechanism.
I don't see this situation improving in Windows 8 either. Good luck with your Windows tablet taking hours to install service packs and updates. Now, do iPads take that long to install updates?
So fact is Microsoft understates or conveniently hides the real system requirements to keep a Windows 7/Vista system running. System requirements are install time may be 15 GB of free disk space but over time, this number increasing is unacceptable, especially
for people's SSDs which are running out of disk space!

How to reduce the size of the message box when appearing on the panel?

When a user display message appearing on the panel,it overlaps my graphs due to its big size.How can I reduce its size or locate it at the corner of the panel?

Can you post an example? If you're referring to the User Message or User Prompt or the other dialogs, I'm not sure if the hooks are there to control where the dialog appears. Someone else might know different.
“A child of five could understand this. Send someone to fetch a child of five.”
― Groucho Marx

Problem: How to reduce display size in Xorg

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