Comment 26 for bug 157777

I upgraded from 7.04 to 7.10 on laptop HP. Didn't have problems in 7.04 but have some now.

I have short lockups of the screen (x-server). I can move the mouse but no reaction on mouseclicks. No response from hitting keyboard (caps lock). The magic SysRq works, did not test <ctrl><alt><backspace> because I only have SHORT lockups (I guess 10 seconds). I have seen them most in Firefox where I do a lot of mousescrolling.

Addition:
sometimes the mousecursor stops moving.
Resizing of a window (systemmonitor) resulted in a lockup too. Sometimes...
Page down with keyboard in Firefox did not result in visible lockup till now...

When screen locks up and I look at the Systemmonitor I always find cpu2 using 100% capacity (today), no memory increase. CPU goes back to normal 5% when lockup stops after some time.

Scrolling in a webpage in Firefox costs about 40% CPU (for each CPU's simultanously). Sometimes I reach 60%, and then the screen seems to freeze, CPU2 is 100% for some time and goes back again to 3% or so.

I use a HP Pavilion dv6361eu:
AMD Turion 64 X2 mobile TL-56
2 GB memory
NVIDIA GeForce Go 7200 256 MB (shared)
MCP51 Serial ATA Controller (Presario V6133CL)
Hitachi HTS 54161 160 GB HDD
Microsoft Natural Ergonomic Keyboard 4000 (yes, M$ works together with Ubuntu LOL) USB
Typhoon 3 button mouse USB

VideoDriver:
NVidea 100.14.19 (1200x800@50 TFT)

kernel parameters (kernel 2.6.22-14-generic):
acpi=force noapic apci=routeirq pnpbios=off pci=routeirq

Hint: stop scrolling, clicking or typing or whatever directly after a lockup, more clicks cost more time to recover.

Hope this helps...