<pre style="white-space:pre-wrap">Hi, I was trying to run xserver on l4linux which is paravirtualised liux running on top of l4</pre><pre style="white-space:pre-wrap">using vesa frame buffer (l4 is running on kvm) and virtual machine hangs with a black screen.</pre> <pre style="white-space:pre-wrap"> When I tried to debug it using gdb, it displays 0xb6ee9b28 in SetResetBIOSVars (pInt=0x820f5a0, set=<value optimized out>) at ../../../../hw/xfree86/int10/helper_exec.c:686 this code is from the xserver 1.7.7 static void SetResetBIOSVars(xf86Int10InfoPtr pInt, Bool set) { int pagesize = getpagesize(); unsigned char* base = xf86MapVidMem(pInt->scrnIndex, VIDMEM_MMIO, 0, pagesize); int i; if (set) { for (i = BIOS_SCRATCH_OFF; i < BIOS_SCRATCH_END; i++) MEM_WW(pInt, i, *(base + i)); } else { for (i = BIOS_SCRATCH_OFF; i < BIOS_SCRATCH_END; i++) /*line 685*/ *(base + i) = MEM_RW(pInt, i); /*line 686*/ //This line of code is not working } xf86UnMapVidMem(pInt->scrnIndex,base,pagesize); } I changed the DEFAULT_INT10 from x86emu to vm86 but then also xserver stops at exactly same Macro.</pre> <pre style="white-space:pre-wrap">Is there any driver which I can use that doesn't uses int10 to set the video mode?</pre><pre style="white-space:pre-wrap"> Also what could be the possible reasons that xserver is showing segmentation fault while running MEM_RW macro??</pre><pre style="white-space:pre-wrap"> </pre><pre style="white-space:pre-wrap">Below is the xserver detail log file:</pre><pre> X.Org X Server 1.7.7 Release Date: 2010-05-04 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.32.29-dsa-ia32 i686 Debian Current Operating System: Linux moarhost 3.0.0-l4-svn23 #72 SMP Thu Mar 8 18:05:24 CET 2012 i686 Kernel command line: mem=400M root=/dev/hda Build Date: 19 February 2011 02:37:36PM xorg-server 2:1.7.7-13 (Cyril Brulebois <<a href="mailto:kibi@debian.org">kibi@debian.org</a>>) Current version of pixman: 0.16.4 Before reporting problems, check <a href="http://wiki.x.org">http://wiki.x.org</a> to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Thu Jan 1 00:00:27 1970 (==) Using system config directory "/usr/share/X11/xorg.conf.d" (==) No Layout section. Using the first Screen section. (==) No screen section available. Using defaults. (**) |-->Screen "Default Screen Section" (0) (**) | |-->Monitor "<default monitor>" (==) No monitor specified for screen "Default Screen Section". Using a default monitor configuration. (==) Automatically adding devices (==) Automatically enabling devices (WW) The directory "/usr/share/fonts/X11/misc" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/Type1" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist. Entry deleted from font path. (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist. Entry deleted from font path. (WW) The directory "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType" does not exist. Entry deleted from font path. (==) FontPath set to: built-ins (==) ModulePath set to "/usr/lib/xorg/modules" (II) The server relies on udev to provide the list of input devices. If no devices become available, reconfigure udev or disable AutoAddDevices. (II) Loader magic: 0x81ecca0 (II) Module ABI versions: X.Org ANSI C Emulation: 0.4 X.Org Video Driver: 6.0 X.Org XInput driver : 7.0 X.Org Server Extension : 2.0 (--) using VT number 7 (--) PCI:*(0:0:1:0) 1234:1111:1af4:1100 Technical Corp. rev 0, Mem @ 0xf0000000/16777216 (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory) (II) LoadModule: "extmod" (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so (II) Module extmod: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.0.0 Module class: X.Org Server Extension ABI class: X.Org Server Extension, version 2.0 (II) Loading extension SELinux (II) Loading extension MIT-SCREEN-SAVER (II) Loading extension XFree86-VidModeExtension (II) Loading extension XFree86-DGA (II) Loading extension DPMS (II) Loading extension XVideo (II) Loading extension XVideo-MotionCompensation (II) Loading extension X-Resource (II) LoadModule: "dbe" (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so (II) Module dbe: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.0.0 Module class: X.Org Server Extension ABI class: X.Org Server Extension, version 2.0 (II) Loading extension DOUBLE-BUFFER (II) LoadModule: "glx" (II) Loading /usr/lib/xorg/modules/extensions/libglx.so (II) Module glx: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.0.0 ABI class: X.Org Server Extension, version 2.0 (==) AIGLX enabled (II) Loading extension GLX (II) LoadModule: "record" (II) Loading /usr/lib/xorg/modules/extensions/librecord.so (II) Module record: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.13.0 Module class: X.Org Server Extension ABI class: X.Org Server Extension, version 2.0 (II) Loading extension RECORD (II) LoadModule: "dri" (II) Loading /usr/lib/xorg/modules/extensions/libdri.so (II) Module dri: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.0.0 ABI class: X.Org Server Extension, version 2.0 (II) Loading extension XFree86-DRI (II) LoadModule: "dri2" (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so (II) Module dri2: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.1.0 ABI class: X.Org Server Extension, version 2.0 (II) Loading extension DRI2 (==) Matched vesa as autoconfigured driver 0 (==) Matched fbdev as autoconfigured driver 1 (==) Assigned the driver to the xf86ConfigLayout (II) LoadModule: "vesa" (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so (II) Module vesa: vendor="X.Org Foundation" compiled for 1.7.7, module version = 2.3.0 Module class: X.Org Video Driver ABI class: X.Org Video Driver, version 6.0 (II) LoadModule: "fbdev" (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so (II) Module fbdev: vendor="X.Org Foundation" compiled for 1.7.6.901, module version = 0.4.2 ABI class: X.Org Video Driver, version 6.0 (II) VESA: driver for VESA chipsets: vesa (II) FBDEV: driver for framebuffer: fbdev (II) Primary Device is: PCI 00@00:01:0 (WW) Falling back to old probe method for fbdev (II) Loading sub module "fbdevhw" (II) LoadModule: "fbdevhw" (II) Loading /usr/lib/xorg/modules/linux/libfbdevhw.so (II) Module fbdevhw: vendor="X.Org Foundation" compiled for 1.7.7, module version = 0.0.2 ABI class: X.Org Video Driver, version 6.0 (II) Loading sub module "vbe" (II) LoadModule: "vbe" (II) Loading /usr/lib/xorg/modules/libvbe.so (II) Module vbe: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.1.0 ABI class: X.Org Video Driver, version 6.0 (II) Loading sub module "int10" (II) LoadModule: "int10" (II) Loading /usr/lib/xorg/modules/libint10.so (II) Module int10: vendor="X.Org Foundation" compiled for 1.7.7, module version = 1.0.0 ABI class: X.Org Video Driver, version 6.0 (II) VESA(0): initializing int10 (WW) System lacks support for changing MTRRs (II) VESA(0): Primary V_BIOS segment is: 0xc000</pre>