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Title: Software/Operating Systems/Linux/Hardware Support/Laptops - 855patch, 855wrap, 845patch, 865patch Some small patches to overcome problems exhibited by some computers with Intel 855GM, 845 or 865 embedded graphics while running XFree86 under Linux.
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855patch, 855wrap, 845patch, 865patch 855patch, 855wrap, 845patch, 865patch[go straight to the downloads] [supported computers]UPDATED2005-07-27: Updated links to related pages.UPDATED2005-03-08: Changed links to contributed Debian packages.UPDATED2004-09-07: Added 845patch for FreeBSD 5.UPDATED2004-08-09: Minor updates, added a possibility to donate money.UPDATED2004-05-31: A fix was released to add support for the 1400x1050 resolution on i855GM. [more]Here you'll find some small hacks to overcome problemsexhibited by somecomputers with Intel 855GM, 845 or 865 embedded graphics (DellInspiron 500m,Dell Latitude D400, Dell Inspiron 1100, Dell Optiplex GX270 and others)whilerunning XFree86 and other X-Window implementations (like X.Org) underLinux and other operating systems. Some of thesecomputers don't allocate enough video memory sothatXFree86 is only able to run at low resolutions and/or color depths(e.g. 640x480x16bit). XFree86 can allocate more memory but it can nottell the BIOS it did so, so the BIOS refuses to set higher resolutions.Here's where the patches come into play: They tell the BIOS the amountofmemory XFree86 will allocate so you can use higher resolutions. Notethat they do not actually allocate the memory, XFree86 must dothat otherwise your system may become unstable because it is usingunallocated memory.Some newer models with 855GM chipset (e.g. Dell Inspiron 510m andDell Latitude D505)have an updated BIOS which is able to set the memory size by itself,thus making 855patch obsolete on these systems. Unfortunately the BIOSintroduces a new bug causing XFree86 to freeze (with a green screen)when using the i810 driver. I wrote a small hack called 855wrap whichwraps around the BIOS and prevents the buggy function from beingcalled. It can also be downloaded below.The functionality of 855patch and 855wrap was added to XFree86 and isincluded in XFree86 4.4.x and its betas. So if you have got a reallynew version of XFree86 you may not need 855patch or 855wrap anymore.System requirements Of course you'll need a system with a graphics chipsetthat exhibits one of the problems mentioned above. (computers known to be affected) XFree86 4.2.x or higher. Other X-Window systems (especiallyX.Org) should also work, althought I'll be only referring to XFree86 inthis document. A 2.4.x (or higher) kernel (See known bugsif you get a segmentation fault withkernel 2.6.x.) The kernel drm-modules and the XFree86 drivers supporting yourgraphics chipset have to be available. If they aren't, installing the driversoffered by Intel may help. XFree86 needs to be configured to use the i810-driver and tosupport dri. Otherwise it can not allocate the memory. Please seethe documentation of your favourite XFree86 configuration tool how toset this. The VideoRam value in the XFree86 configuration has to be atleast the value you specify calling the patch. Please use yourfavouriteconfiguration tool again.If you configure XFree86 by editing XF86Config the last two pointscan be achieved: by adding a line Load "dri"to the Section "Module" by using the Driver "i810"in the Section "Device" by setting VideoRamto the desired value in the Section"Device"InstallationDownload the appropiate patch for your chipset, extract it, make itand copy the executable(855patch, 855wrap, 845patch or 865patch) to some location in the path,e.g./usr/bin. Or use one of thecontributed packages, if available.Usage for 8x5patch: Simply run855patch, 845patch or 865patch with the amount of videomemory in kB that XFree86will allocate as argument before starting XFree86. (e.g. 855patch 16384)If you get a "segmentation fault" error, download version 0.2 and add"nocheck" (without the quotes) to the call of 8x5patch. (see known bugs) for 855wrap: Simply run855wrap without parameters before starting XFree86. Every Linux distribution has scripts that get called whilestarting. They are a good place to run my programs. Consult the helpfiles provided with your distribution to find out what to do. Known bugs Some users reported a corrupted screen or some blinking lineswhenswitching back to text mode. I looks like it only happens when youset X to use 24 bits color depth. As a workaround, I suggest reducingthe color depth. 16 bits should be enough for most applications. Pleasesee the appropiate help file/website how to do this. 855patch, 855wrap, 845patch or 865patch don't add support for aresolution of 1400x1050. There is a third-party fixthough. Users of some 2.6.3 kernels provided by Fedora got a segmentationfault while running 855patch, 845patch or 865patch. I implemented awork around in version 0.2 of the patches. Add "nocheck" (without thequotes) to the command line to avoid that the affected function iscalled. Unfortunately this makes the patches less safer to run becausein this case the location to be patched can not be verified to becorrect. However in most cases there should be no problem even with"nocheck".1400x1050Alain Poirier wrote a program called 855resolution to get the 1400x1050resolution on i855GMbased computers. It has been tested successfully on a lot of computers.Please refer to Alain'sweb page for moreinformation and for downloading.Disclaimer855patch, 855wrap, 845patch and 865patch are free to use, distributeormodify. But please mention myname and the names of the respective contributors.I tried to make the programs as safe as possible but obviously I can'tguarantee that they'll work for you. So don't blame me if something badhappens. This might especially be the case if the system requirementsaren't met.Donate moneyAs I wrote above, 855patch, 855wrap, 845patch and 865patch are free,soyou don't have to pay money to anyone to use them. But maybe one ofthese programs saved your day and you're looking for a way to thank mefor the time and effort I put in this software. Then please feel freedonating me an amount of your choice via PayPal. Downloads (general) Thevideo drivers by Intel. They provide drm, dri and the i810 driverthat needed if they didn't come with your version of XFree86. Downloads for older i855GM-based computers: 855patch the source file (version 0.2): 855patch.tar.gz a rpm-package (version 0.2) contributed by Ofer Achler: http://projects.nudieman.com/500m/ a deb-package (version 0.2) contributed by Joe Lazaro: (currentlydown, sorry) a port to FreeBSD (may work for other BSDs, too) contributed byDavid Malone: http://www.cnri.dit.ie/~dwmalone/855patchDownloads for newer i855GM-based computers: 855wrap the source file (based on the solution found by Alain Poirier): 855wrap.tar.gz Downloads for i845-based computers the source file (version 0.2): 845patch.tar.gz a rpm-package (version 0.2) contributed by Ofer Achler: http://projects.nudieman.com/500m/ a deb-package (version 0.2) contributed by Joe Lazaro: (currentlydown, sorry) a port to FreeBSD 5 contributed by Murray Stokely: 845patch-freebsd5.diff a port to FreeBSD (tested with 4.9-RELEASE) contributed byMacallan and ShadoeMynX: 845patch_BSD.tar.gz Downloads for i865-based computers the source file (version 0.2, changes for i865 contributed byMarc Seil): 865patch.tar.gz a rpm-package (version 0.2) contributed by Ofer Achler: http://projects.nudieman.com/500m/ a deb-package (version 0.2) contributed by Joe Lazaro, mirroredby Tero Karvinen: http://www.iki.fi/karvinen/865patch_0.2-3_i386.deb rpm-packages with init.d script (version 0.2) contributed byMartin J. Hsu: binary, source, README a startup script for SuSE 9 contributed by Matthias Ferdinand: 865suse.tar.gz a port to FreeBSD (binary and source) contributed by LawrenceStewart: 865freebsdpatch.tgz Related links myinitial announcement of 855patch on the XFree86 developer mailing list(downloadlink given there isn't accurate anymore) auser of 855patch with a Dell Latitude D400 a germanarticle on running SuSE Linux and 855patch on a Dell Latitude D500 technicaldescription of the problem I wrote 855wrap for getting1024x768 to run on a Dell Inspiron 510m with FedoraCore avery detailed description on running Linux on the Dell Inspiron 1100 installingand running 865patch on Fedora Core 1 runningFedora and Debian Linux on a Dell Optiplex G270 Contact855patch, 855wrap, 845patch and most of 865patch were written by me,Christian Zietz, czietz@gmx.net.I'm interested inhearing if they work for you. But please understand that my timeavailable for this software is limited, so that I can't guarantee aprompt and detailed response to all of your requests, especially ifthey are not specific to the software on this page but about generalLinux/X issues. If you want to thank me, you can also donate money via PayPal.  |
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Some | small | patches | to | overcome | problems | exhibited | by | some | computers | with | Intel | 855GM, | 845 | or | 865 | embedded | graphics | while | running | XFree86 | under | Linux. |
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855patch, 855wrap, 845patch, 865patch 2008 October
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