Hi, I have installed archlinux + xbmc + lxde In boot, lxde is disabled and xbmc is enabled. The xbmc works very well, the problem is when I play a movie that a horizontal line appears at the top. With lxde no problem when I play the movie and see desktop very well. I have this graphic card: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] This is log when I start xbmc: Xorg.0.log: [root@arch-xbmc ~]# tail -f /var/log/Xorg.0.log [ 79584.467] (II) RADEON(0): Modeline "1440x900"x0.0 136.75 1440 1536 1688 1936 900 903 909 942 -hsync +vsync (70.6 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1600x1200"x0.0 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync (75.0 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1680x1050"x0.0 119.00 1680 1728 1760 1840 1050 1053 1059 1080 +hsync -vsync (64.7 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1440x480i"x0.0 27.00 1440 1478 1602 1716 480 488 494 525 interlace -hsync -vsync (15.7 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1440x576i"x0.0 27.00 1440 1464 1590 1728 576 580 586 625 interlace -hsync -vsync (15.6 kHz e) [ 79584.467] (II) RADEON(0): Modeline "720x576"x0.0 27.00 720 732 796 864 576 581 586 625 -hsync -vsync (31.2 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1920x1080"x0.0 74.25 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync (27.0 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1920x1080"x0.0 74.25 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync (28.1 kHz e) [ 79584.467] (II) RADEON(0): Modeline "1920x1080"x0.0 74.25 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (33.8 kHz e) [ 79584.467] (II) RADEON(0): Modeline "2880x480"x0.0 108.00 2880 2944 3192 3432 480 489 495 525 -hsync -vsync (31.5 kHz e) messages: May 22 13:41:05 arch-xbmc xinit[13052]: Loading extension GLX May 22 13:41:05 arch-xbmc xinit[13052]: (II) [KMS] Kernel modesetting enabled. May 22 13:41:05 arch-xbmc xinit[13052]: The XKEYBOARD keymap compiler (xkbcomp) reports: May 22 13:41:05 arch-xbmc xinit[13052]: > Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols May 22 13:41:05 arch-xbmc xinit[13052]: > Ignoring extra symbols May 22 13:41:05 arch-xbmc xinit[13052]: Errors from xkbcomp are not fatal to the X server May 22 13:41:05 arch-xbmc xinit[13052]: which: no start-pulseaudio-x11 in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin) May 22 13:41:05 arch-xbmc xinit[13052]: which: no pulse-session in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin) May 22 13:41:07 arch-xbmc dbus[225]: [system] Activating via systemd: service name='org.freedesktop.Avahi' unit='dbus-org.freedesktop.Avahi.service' May 22 13:41:07 arch-xbmc dbus[225]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.Avahi.service': Unit dbus-org.freedesktop.Avahi.service failed to load: No such file or directory. journalctl -xn: -- Logs begin at dom 2014-05-11 13:03:52 CEST, end at jue 2014-05-22 13:43:07 CEST. -- may 22 13:43:04 arch-xbmc xinit[13134]: (II) [KMS] Kernel modesetting enabled. may 22 13:43:04 arch-xbmc kernel: [drm:dce4_afmt_write_speaker_allocation] *ERROR* Couldn't read Speaker Allocation Data Block: 0 may 22 13:43:04 arch-xbmc xinit[13134]: The XKEYBOARD keymap compiler (xkbcomp) reports: may 22 13:43:04 arch-xbmc xinit[13134]: > Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols may 22 13:43:04 arch-xbmc xinit[13134]: > Ignoring extra symbols may 22 13:43:04 arch-xbmc xinit[13134]: Errors from xkbcomp are not fatal to the X server may 22 13:43:04 arch-xbmc xinit[13134]: which: no start-pulseaudio-x11 in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin) may 22 13:43:04 arch-xbmc xinit[13134]: which: no pulse-session in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin) may 22 13:43:07 arch-xbmc dbus[225]: [system] Activating via systemd: service name='org.freedesktop.Avahi' unit='dbus-org.freedesktop.Avahi.service' may 22 13:43:07 arch-xbmc dbus[225]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.Avahi.service': Unit dbus-org.freedesktop.Avahi.service failed to Is possible the problem is driver ati?? Thanks in advanced.