After upgrading to kernel 2.6.29-r5 from 2.6.27-r7 (gentoo sources), FN+F8 key on my Dell E6400 (toggle to ext monitor) stopped working. Not just that, it blinks the monitor on the host to a black screen from which it is impossible to recover (e.g. pressing FN-F8 again doesn't help). Advice on troubleshooting it? Reproducible: Always
$ sudo emerge --info Portage 2.1.6.13 (default/linux/x86/2008.0/desktop, gcc-4.1.2, glibc-2.8_p20080602-r1, 2.6.29-gentoo-r5 i686) ================================================================= System uname: Linux-2.6.29-gentoo-r5-i686-Intel-R-_Core-TM-2_Duo_CPU_T9600_@_2.80GHz-with-glibc2.0 Timestamp of tree: Mon, 15 Jun 2009 09:45:01 +0000 ccache version 2.4 [disabled] app-shells/bash: 3.2_p39 dev-java/java-config: 1.3.7-r1, 2.1.7 dev-lang/python: 2.5.4-r2 dev-util/ccache: 2.4-r7 dev-util/cmake: 2.6.2-r1 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.63 sys-devel/automake: 1.4_p6, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.27-r2 ACCEPT_KEYWORDS="x86" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://mirror.switch.ch/ftp/mirror/gentoo/ http://gentoo.mirror.solnet.ch http://gentoo.intergenia.de ftp://ftp.solnet.ch/mirror/Gentoo" LDFLAGS="-Wl,-O1" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X acl acpi alsa archive arts artswrappersuid async bash-completion berkdb bindist bluetooth branding bzip2 cairo cardbus cdparanoia cdr cli cracklib crypt css cups curlwrappers dell dga dhcp directfb djbfft dri dvb dvd dvdr dvdread emboss encode evo fat fbcon fbsplash fftw firefox foomaticdb fortran fpx ftp gdbm gif glibc-omitfp gnutls gphoto2 gpm gs gtk gzip hal hpn iconv icq idea imagemagick imap ipod ipv6 irda isdnlog jabber java javascript jikes john jpeg jpeg2k kde kdepim kpathsea lapack libnotify mbox messages midi mikmod mime mmap mmx mmxext mozilla mp3 mpeg mplayer msn mudflap mysqli nagios-dns ncurses nls nocd nptl nptlonly ntfs ntlm nvidia octave ogg opengl oscar pam pcapnav pcmcia pcntl pcre pda pdf perl pmu png posix ppds pppd python qt3 qt3support qt4 quicktime radius rdesktop readline reflection replytolist samba scanner session sharedmem silc slp sms sockets sox spell spl sse sse2 sse3 sse4.1 ssl startup-notification svga sysfs sysvipc tcpd tetex threads tiff truetype type1 unicode usb userlocales v4l v4l2 vcd vorbis wifi win32codecs winbind x86 xcomposite xine xml xmlrpc xorg xulrunner xvid yahoo zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse synaptics evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="nvidia" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG, LC_ALL, LINGUAS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Created attachment 194780 [details] Old, 2.6.27 .config
Created attachment 194781 [details] New 2.6.29 config
Additional testing: the machine doesn't lock up (it responds to soft reboot through power key, and caps/num lock also seemingly work), just blacks out. If I use the fn-f8 key from console I can export the screen to the external port without issue and return. Under X this does not work correctly. I am using nvidia's own drivers, version 177.82. The newer one exhibited problems also with the old kernel.
Tried also to upgrade to latest stable, latest unstable, earlier stable. Same behavior: 2.6.27 always works, 2.6.29 always blacks out.
FYI, just in case someone ever wishes to pick up this bug, with 2.6.28-r5 the behaviour is similar
Brace yourselves for an Ubuntu wiki link: https://wiki.ubuntu.com/Hotkeys/Troubleshooting Please do try the xev command on the "Step-by-step Troubleshooting" section and check if you get any actions for the FN+F8 combo (also try other FN combos that actually work to compare the output.). If you are using Gnome, try killing the gnome-power-manager first (Yes, it surely seems like a kernel regression, but I just want to be sure). Thanks!
(In reply to comment #5) > Tried also to upgrade to latest stable, latest unstable, earlier stable. Do you mean that you tried with gentoo-sources-2.6.30*? Can you also try with the latest 2.6.31-rc?
(In reply to comment #8) > (In reply to comment #5) > > Tried also to upgrade to latest stable, latest unstable, earlier stable. > Do you mean that you tried with gentoo-sources-2.6.30*? > Can you also try with the latest 2.6.31-rc? Tried with 2.6.30, same as above. Blacks out, no way to get anything back.
It looks like this bug exists also in Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=540711 Please test the latest git-sources, and upon failure, file this upstream at http://bugzilla.kernel.org and paste the url here.
I seemingly resolved this bug by enabling the video ACPI module. Don't ask...
