Trying to watch tv with fbtv fails with the above error. Hardware:SAA7134-based DVB-C card (Fujitsu Siemens), onboard i810 graphics Tested Kernels: 2.6.18.8, 2.6.23-gentoo-r8, 2.6.24.3, 2.6.25-rc6 Boot parameter: lapic video=i810fb:hsync1:30,hsync2:72,vsync1 :50,vsync2:120,accel,mtrr,640x480-16@100 Seems not to be fb-driver specific, due this happens also using a Kyro or S3 device. Other users reported this also on nvidiafb, radeonfb and rivafb. Attached strace shows that a very too high amount of mem is tried to be mapped. This doesn't happen on a self-compiled fbtv with gentoos patches applied. But this fails with freese of the console (see attached strace). Reproducible: Always Steps to Reproduce: 1. try to start fbtv Actual Results: mmap: Cannot allocate memory on a emerged fbtv, console freeze on home-brew + gentoo-patched fbtv. Expected Results: Show tv. lspci: 00:00.0 Host bridge: Intel Corporation 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82815 CGC [Chipset Graphics Controller] (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801AA PCI Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801AA IDE Controller (rev 02) 01:0a.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01) emerge -pv xawtv: [ebuild R ] media-tv/xawtv-3.95-r1 USE="lirc mmx -X -aalib -alsa -dv -motif -nls -opengl -quicktime -xext -xv -zvbi" 0 kB emerge --info Portage 2.1.4.4 (default-linux/x86/2007.0, gcc-4.1.1, glibc-2.5-r0, 2.6.25-rc6 i686) ================================================================= System uname: 2.6.25-rc6 i686 Pentium III (Coppermine) Timestamp of tree: Mon, 17 Mar 2008 22:00:04 +0000 app-shells/bash: 3.2_p17-r1 dev-lang/python: 2.4.3-r4 dev-python/pycrypto: 2.0.1-r6 sys-apps/baselayout: 1.12.9 sys-apps/sandbox: 1.2.18.1-r2 sys-devel/autoconf: 2.61 sys-devel/automake: 1.10 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.14 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.17-r2 ACCEPT_KEYWORDS="x86" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium3 -pipe" CHOST="i686-pc-linux-gnu" CXXFLAGS="-O2 -march=pentium3 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks metadata-transfer parallel-fetch sandbox sfperms strict unmerge-orphans userfetch" MAKEOPTS="-j2" USE="acl bash-completion berkdb bzip2 cli cracklib crypt cups dri fbcon fortran gdbm iconv isdnlog jpeg lirc md5sum midi mmx mudflap ncurses nptl nptlonly openmp pam pcre pppd readline reflection session spl ssl symlink vim-syntax vram x86 xorg zlib" Frame buffer device information: Name : I810 Address : 0xd0800000 Size : 4194304 Type : PACKED PIXELS Visual : TRUECOLOR XPanStep : 8 YPanStep : 1 YWrapStep : 0 LineLength : 1280 MMIO Address: 0xd4000000 MMIO Size : 524288 Accelerator : Unknown (39)
Created attachment 146459 [details] strace for emerged xawtv/fbtv See line 200: 3,2 GB should be mapped. This fails gently.
Created attachment 146460 [details] strace for self compiled xawtv/fbtv See line 107: 4 MB (correct size) should be mapped. Thereafter something went wrong, the console freezes. You can still work blind. The main difference to emerged fbtv is that no plugins could be loaded. So maybe a xawtv plugin caused the wrong size detection.
Several gdb sessions of the self-compiled fbtv also freezed. Location: fbtools.c, function fb_setvt, line 268, "switch(fork()) {"
The above listed hardware works with Debian Etch, so there's no hardware issue. Gentoo fails even on an BX-board with a G450 (matroxfb). Further debugging brought up, that the mmap error is caused at fbtools.c:428. fb_mem_offset is a huge negative value at this point. In my self compiled fbtv, this value was 0. The console freezes later in fb_activate_current.
Closing this, because the machine where this has happened doesn't exist anymore.
