Binary package hint: xorg
I've had MANY X related issues today since a recent package update on Jaunty, and this one is the most reproducible. Every time I issue a ctrl-alt-f<#> to switch to a tty, the screen goes black, one or two random color ascii characters are displayed, and I'm kicked out of my Xsession. I'm running on a Lenovo X301.
[backtrace]
#0 0xb7fdc424 in __kernel_vsyscall ()
No symbol table info available.
#1 0xb7c6ad59 in ioctl () from /lib/tls/i686/cmov/libc.so.6
No locals.
#2 0x080c86f1 in xf86ProcessActionEvent (action=ACTION_SWITCHSCREEN, arg=0xbfff7d40) at ../../../../hw/xfree86/common/xf86Events.c:238
No locals.
#3 0x081c590b in XkbDDXSwitchScreen (dev=0xd4096d0, key=67 'C', act=0x5606) at ../../../../hw/xfree86/dixmods/xkbVT.c:55
scrnnum = 1
#4 0x081adfae in _XkbFilterSwitchScreen (xkbi=0xd3cfda8, filter=0xdcf5450, keycode=67, pAction=0xbfff7e48) at ../../xkb/xkbActions.c:979
dev = (DeviceIntPtr) 0xd4096d0
#5 0x081af598 in XkbHandleActions (dev=0xd4096d0, kbd=0xd4096d0, xE=0xd3d9ee8, count=1) at ../../xkb/xkbActions.c:1216
key = 67
bit = <value optimized out>
realMods = <value optimized out>
xkbi = (XkbSrvInfoPtr) 0xd3cfda8
keyc = (KeyClassPtr) 0xd40e4d0
sendEvent = 1
genStateNotify = 1
oldState = {group = 0 '\0', locked_group = 0 '\0', base_group = 0, latched_group = 0, mods = 28 '\034', base_mods = 12 '\f', latched_mods = 0 '\0', locked_mods = 16 '\020', compat_state = 28 '\034', grab_mods = 28 '\034', compat_grab_mods = 28 '\034', lookup_mods = 28 '\034', compat_lookup_mods = 28 '\034', ptr_buttons = 0}
act = {any = {type = 13 '\r', data = "\005\001\000\000\000\000"}, mods = {type = 13 '\r', flags = 5 '\005', mask = 1 '\001', real_mods = 0 '\0', vmods1 = 0 '\0', vmods2 = 0 '\0'}, group = {type = 13 '\r', flags = 5 '\005', group_XXX = 1 '\001'}, iso = {type = 13 '\r', flags = 5 '\005', mask = 1 '\001', real_mods = 0 '\0', group_XXX = 0 '\0', affect = 0 '\0', vmods1 = 0 '\0', vmods2 = 0 '\0'}, ptr = {type = 13 '\r', flags = 5 '\005', high_XXX = 1 '\001', low_XXX = 0 '\0', high_YYY = 0 '\0', low_YYY = 0 '\0'}, btn = {type = 13 '\r', flags = 5 '\005', count = 1 '\001', button = 0 '\0'}, dflt = {type = 13 '\r', flags = 5 '\005', affect = 1 '\001', valueXXX = 0 '\0'}, screen = {type = 13 '\r', flags = 5 '\005', screenXXX = 1 '\001'}, ctrls = {type = 13 '\r', flags = 5 '\005', ctrls3 = 1 '\001', ctrls2 = 0 '\0', ctrls1 = 0 '\0', ctrls0 = 0 '\0'}, msg = {type = 13 '\r', flags = 5 '\005', message = "\001\000\000\000\000"}, redirect = {type = 13 '\r', new_key = 5 '\005', mods_mask = 1 '\001', mods = 0 '\0', vmods_mask0 = 0 '\0', vmods_mask1 = 0 '\0', vmods0 = 0 '\0', vmods1 = 0 '\0'}, devbtn = {type = 13 '\r', flags = 5 '\005', count = 1 '\001', button = 0 '\0', device = 0 '\0'}, devval = {type = 13 '\r', device = 5 '\005', v1_what = 1 '\001', v1_ndx = 0 '\0', v1_value = 0 '\0', v2_what = 0 '\0', v2_ndx = 0 '\0', v2_value = 0 '\0'}, type = 13 '\r'}
filter = (XkbFilterPtr) 0x0
keyEvent = 1
backupproc = <value optimized out>
#6 0x081af953 in XkbProcessKeyboardEvent (xE=0xd3d9ee8, keybd=0xd4096d0, count=1) at ../../xkb/xkbPrKeyEv.c:186
keyc = (KeyClassPtr) 0xd40e4d0
xkbi = (XkbSrvInfoPtr) 0x4e
key = 67
ndx = <value optimized out>
xiEvent = 64
#7 0x081a7810 in AccessXFilterPressEvent (xE=0xd3d9ee8, keybd=0xd4096d0, count=1) at ../../xkb/xkbAccessX.c:559
xkbi = (XkbSrvInfoPtr) 0xd3cfda8
ctrls = (XkbControlsPtr) 0xd3d4950
ignoreKeyEvent = 0
key = 67 'C'
#8 0x081aff1e in ProcessKeyboardEvent (xE=0xd3d9ee8, keybd=0xd4096d0, count=1) at ../../xkb/xkbPrKeyEv.c:222
keyc = (KeyClassPtr) 0xd40e4d0
xkbi = <value optimized out>
backup_proc = <value optimized out>
is_press = 1
is_release = <value optimized out>
#9 0x08114792 in mieqProcessInputEvents () at ../../mi/mieq.c:474
handler = (mieqHandler) 0
e = (EventRec *) 0x81f1ce0
type = 78
nevents = 1
evlen = <value optimized out>
i = <value optimized out>
screen = (ScreenPtr) 0x9bd37a8
dev = (DeviceIntPtr) 0xd4096d0
master = (DeviceIntPtr) 0xd36e3e8
event = (xEvent *) 0xd3d9ee8
event_size = 68
[lspci -vvv]
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
Subsystem: Lenovo Device 20e0
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
Subsystem: Lenovo Device 20e4
Attaching Xorg.log.0.old file, and fwiw, this also reproduces with compiz disabled.