From Bugzilla Helper:
User-Agent: Mozilla/5.0 (compatible; Konqueror/3.4; Linux) KHTML/3.4.1 (like Gecko)

Description of problem:
Under KDE, I have checked the option to request a password when interrupting a  
screensaver.  Whenever one of the KDE 3D screensavers is running (e.g.  
kpendulum), when I move the mouse, a login box appears.  As I type my  
password, the keyboard, mouse, and screen freeze and I need to unplug the  
computer.   
NOTE:  I have a Radeon 9700 video card with ati proprietary driver. 
Xscreensavers seem to work fine.  Also, in FC3 it used to work.    

Version-Release number of selected component (if applicable):
kde-3.4.1-0.fc4.1

How reproducible:
Always

Steps to Reproduce:
1. right-click on desktop -> configure -> screensaver   
2. select "pendulum" from 3d list; check "require password to stop" box -> ok 
3. right-click on desktop -> lock session: pendulum screensaver starts 
4. move mouse/press key: login dialogue appears -> begin typing password 
    

Actual Results:  system freezes  

Expected Results:  log back in to KDE 

Additional info:

from /var/log/messages: 
 
Jun 23 09:35:39 localhost kernel: Unable to handle kernel NULL pointer 
dereference at virtual address 00000016 
Jun 23 09:35:39 localhost kernel:  printing eip: 
Jun 23 09:35:39 localhost kernel: f9164d6e 
Jun 23 09:35:39 localhost kernel: *pde = 2878a067 
Jun 23 09:35:39 localhost kernel: Oops: 0000 [#1] 
Jun 23 09:35:39 localhost kernel: Modules linked in: appletalk ipx fglrx(U) 
parport_pc lp parport autofs4 rfcomm l2cap bluetooth sunrpc pcmcia ipt_REJECT 
ipt_state ip_conntrack iptable_filter ip_tables nls_utf8 ntfs dm_mod video 
button battery ac ohci1394 ieee1394 yenta_socket rsrc_nonstatic pcmcia_core 
uhci_hcd ehci_hcd snd_intel8x0m snd_intel8x0 snd_ac97_codec snd_seq_dummy 
snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss 
snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc ipw2200(U) 
ieee80211(U) ieee80211_crypt(U) r8169 ext3 jbd 
Jun 23 09:35:39 localhost kernel: CPU:    0 
Jun 23 09:35:39 localhost kernel: EIP:    0060:[<f9164d6e>]    Tainted: P      
VLI 
Jun 23 09:35:39 localhost kernel: EFLAGS: 00010086   
(2.6.11-1.1369_FC4_cubbi8_swsusp2)  
Jun 23 09:35:39 localhost kernel: EIP is at sig_notifier+0xe/0x60 [fglrx] 
Jun 23 09:35:39 localhost kernel: eax: f918e8e8   ebx: 00000012   ecx: 
f9164d60   edx: ec456aa0 
Jun 23 09:35:39 localhost kernel: esi: f455c000   edi: f455cf0c   ebp: 
00000012   esp: f455ce44 
Jun 23 09:35:39 localhost kernel: ds: 007b   es: 007b   ss: 0068 
Jun 23 09:35:39 localhost kernel: Process kpendulum.kss (pid: 3452, 
threadinfo=f455c000 task=ec456aa0) 
Jun 23 09:35:39 localhost kernel: Stack: badc0ded f7d38cac f455c000 c012f14e 
00000012 00000013 000f4232 00000000  
Jun 23 09:35:39 localhost kernel:        ec456f04 f455cf0c ec456aa0 c012f322 
00000001 24c6ac40 00000000 f455ce9c  
Jun 23 09:35:39 localhost kernel:        ffff23f5 f455ce9c ffff23f5 c038a231 
f455c000 f455c000 f455c000 f455c000  
Jun 23 09:35:39 localhost kernel: Call Trace: 
Jun 23 09:35:39 localhost kernel:  [<c012f14e>] __dequeue_signal+0x106/0x1bd 
Jun 23 09:35:39 localhost kernel:  [<c012f322>] dequeue_signal+0x11d/0x244 
Jun 23 09:35:39 localhost kernel:  [<c038a231>] schedule_timeout+0xdb/0x124 
Jun 23 09:35:39 localhost kernel:  [<c0132405>] 
get_signal_to_deliver+0xe6/0xaa5 
Jun 23 09:35:39 localhost kernel:  [<c0103865>] do_signal+0x5d/0x111 
Jun 23 09:35:39 localhost kernel:  [<c015e6c1>] audit_syscall_exit+0x496/0x4ab 
Jun 23 09:35:39 localhost kernel:  [<c01a27b1>] __pollwait+0x0/0x96 
Jun 23 09:35:39 localhost kernel:  [<c01a30e2>] sys_select+0x2c3/0x38d 
Jun 23 09:35:39 localhost kernel:  [<c0108459>] do_syscall_trace+0x112/0x123 
Jun 23 09:35:39 localhost kernel:  [<c0103940>] do_notify_resume+0x27/0x37 
Jun 23 09:35:39 localhost kernel:  [<c0103ae2>] work_notifysig+0x13/0x15 
Jun 23 09:35:39 localhost kernel: Code: 04 24 03 00 00 00 e8 bc ab ff ff 89 c2 
f7 da eb e8 8d b6 00 00 00 00 8d bf 00 00 00 00 83 ec 08 89 1c 24 8b 5c 24 0c 
89 74 24 04 <8b> 53 04 8b 0a 85 c9 78 10 b8 01 00 00 00 8b 1c 24 8b 74 24 04  
Jun 23 09:35:39 localhost kernel:  <0>Fatal exception: panic in 5 seconds