System freezes.

[Dachs]

Hello community.
Now I know this can be a bit of a tricky one to pin down as many things can cause a system to freeze but I'll tell you what I know and maybe you can point me in the right direction.
The screen freezes apart for the cursor which I can still move and caps lock light will go on and off. It often happens when I am using iceweasel, (but also konqueror and chromium) when I am websites with lots of flash and javascript i.e facebook but I has frozen when no browsers is open, so I don't think its a javascript problem.
I can ctrl+alt+F1 and restartx but it won't respond to much else, I've heard of a similar problem with the nvidia driver but I'm not using an nvidia graphics card.
Any Ideas?

btw i'm running a Lenovo B550
                             system      Computer
/0                           bus         Motherboard
/0/0                         memory      3891MiB System memory
/0/1                         processor   Intel(R) Core(TM)2 Duo CPU     T6570  @ 2.10GHz
/0/100                       bridge      Mobile 4 Series Chipset Memory Controller Hub
/0/100/2                     display     Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/2.1                   display     Mobile 4 Series Chipset Integrated Graphics Controller
/0/100/1a                    bus         82801I (ICH9 Family) USB UHCI Controller #4
/0/100/1a/1      usb2        bus         UHCI Host Controller
/0/100/1a.1                  bus         82801I (ICH9 Family) USB UHCI Controller #5
/0/100/1a.1/1    usb3        bus         UHCI Host Controller
/0/100/1a.2                  bus         82801I (ICH9 Family) USB UHCI Controller #6
/0/100/1a.2/1    usb4        bus         UHCI Host Controller
/0/100/1a.7                  bus         82801I (ICH9 Family) USB2 EHCI Controller #2
/0/100/1a.7/1    usb1        bus         EHCI Host Controller
/0/100/1b                    multimedia  82801I (ICH9 Family) HD Audio Controller
/0/100/1c                    bridge      82801I (ICH9 Family) PCI Express Port 1
/0/100/1c.1                  bridge      82801I (ICH9 Family) PCI Express Port 2
/0/100/1c.2                  bridge      82801I (ICH9 Family) PCI Express Port 3
/0/100/1c.2/0                network     BCM4312 802.11b/g LP-PHY
/0/100/1c.3                  bridge      82801I (ICH9 Family) PCI Express Port 4
/0/100/1c.5                  bridge      82801I (ICH9 Family) PCI Express Port 6
/0/100/1c.5/0    eth0        network     NetLink BCM5906M Fast Ethernet PCI Express
/0/100/1d                    bus         82801I (ICH9 Family) USB UHCI Controller #1
/0/100/1d/1      usb5        bus         UHCI Host Controller
/0/100/1d/1/2                input       USB OPTICAL MOUSE
/0/100/1d.1                  bus         82801I (ICH9 Family) USB UHCI Controller #2
/0/100/1d.1/1    usb6        bus         UHCI Host Controller
/0/100/1d.2                  bus         82801I (ICH9 Family) USB UHCI Controller #3
/0/100/1d.2/1    usb7        bus         UHCI Host Controller
/0/100/1d.7                  bus         82801I (ICH9 Family) USB2 EHCI Controller #1
/0/100/1d.7/1    usb8        bus         EHCI Host Controller
/0/100/1d.7/1/3              multimedia  Lenovo EasyCamera
/0/100/1e                    bridge      82801 Mobile PCI Bridge
/0/100/1f                    bridge      ICH9M LPC Interface Controller
/0/100/1f.2                  storage     82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode]
/0/100/1f.3                  bus         82801I (ICH9 Family) SMBus Controller
/0/100/1f.6                  generic     82801I (ICH9 Family) Thermal Subsystem
/0/2             scsi0       storage     
/0/2/0.0.0       /dev/sda    disk        320GB WDC WD3200BEVT-2
/0/2/0.0.0/1     /dev/sda1   volume      250GiB EXT4 volume
/0/2/0.0.0/2     /dev/sda2   volume      23GiB EXT4 volume
/0/2/0.0.0/3     /dev/sda3   volume      23GiB EXT4 volume
/0/3             scsi1       storage     
/0/3/0.0.0       /dev/cdrom  disk        DVDRAM GT30N

[dibl]

When the display freezes, does the audio continue normally?

[Dachs]

yes, just tested that, the audio continues.

[dibl]

So the issue is (probably) the graphics driver, or chip, or elsewhere on the motherboard if it is hardware.  The flashing keyboard light suggests a kernel panic, but I would not expect audio to continue or Ctrl-Alt-F1 to work in that case.  Let's have a look at the output of

Code Select Expand

inxi -G

[Dachs]

Hi, sorry I don't think I made it clear before, the keyboard light does not flash but the caps lock light will respond when pressed,

Code Select Expand

$ inxi -G
Graphics:  Card: Intel Mobile 4 Series Integrated Graphics Controller
           Display Server: X.Org 1.17.2 drivers: (unloaded: fbdev,vesa) Resolution: 1366x768@60.04hz
           GLX Renderer: Mesa DRI Mobile Intel GM45 Express GLX Version: 2.1 Mesa 10.5.9








thanks,

[dibl]

OK then I did misunderstand and there's no kernel panic.  That is why music and mouse are still working.
I have no crisp answer or fix to offer -- there are numerous open bugs in Debian and I did not read through all of them, but "freezing while scrolling" is definitely mentioned, so I would suppose you are suffering the same as those folks.

[Dachs]

thanks for pointing me on the right direction, it does look similar to the scrolling bug reported there will check some more so I guess its probably an xserver problem.