failed to get i915 symbols, graphics turbo disabled error on boot

[patrickwilken]

Same problem on my Samsung RF-510.

[tomtom12]

With Ubuntu 10.10: Same on my Samsung Q330 (Nvidia Optimus). But Bios does not have option to disable one or the other, so both kept running -> laptop became lapHOT

Changed it for an HP DM4 1160 because of that (too bad Nvidia - you are loosing customers). Everything runs out of the box - great. Even Compiz advanced effects...but... during start up I get the same error - briefly... Please note: this DM4 1160 does *not* have any discrete graphics , just the intel core i5 integrated

[obi22]

Hi there all you guys that cannot run your laptops!

Did you try to look at bios for graphic settings something like: Discreet/Switchable ?

For now switchable doesn't work for me, but discreet does, I'm on Acer 5745G, i5, nVidia 330m.

[n5xmt]

Hi there all you guys that cannot run your laptops!

Did you try to look at bios for graphic settings something like: Discreet/Switchable ?

For now switchable doesn't work for me, but discreet does, I'm on Acer 5745G, i5, nVidia 330m.

Mine runs, but I always get this message on start up.
the other issue I have is if I close the lid, upon opening, I have to do Ctrl-Alt-F1, then Ctrl-Alt-F7 to get the display back... wasn't an issue under 10.04...

[daragon]

I had the issue too,but i found a method to forbiden it

sudo gedit /etc/modprobe.d/blacklist.conf

add

blacklist intel_ips

that will work

[andys42]

I had a similar problem with my Thinkpad Edge 11. It has an Intel i3 and only has the integrated graphics on the CPU.

Using the 2.6.36-24 kernel image the output from the intel_ips module in dmesg was:

[    6.864987] intel ips 0000:00:1f.6: Warning: CPU TDP doesn't match expected value (found 11, expected 18)
[    6.865045] intel ips 0000:00:1f.6: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[    6.865316] intel ips 0000:00:1f.6: failed to get i915 symbols, graphics turbo disabled
[    6.916727] intel ips 0000:00:1f.6: IPS driver initialized, MCP temp limit 65535

I found what appears to be a fix to the overall problem but you still get the error on bootup. Run the following:

Removing the intel_ips module and inserting it again with:

modprobe -r intel_ips
modprobe intel_ips

gave this output from intel_ips in dmesg:

[   82.337585] intel ips 0000:00:1f.6: Warning: CPU TDP doesn't match expected value (found 11, expected 18)
[   82.340231] intel ips 0000:00:1f.6: IPS driver initialized, MCP temp limit 65535

If you care, this is how I found this. It'll involve looking through chunks of C in the kernel source:
The problem was with the intel_ips kernel module, so I got the kernel source, found the code for the module ("find ./ -name intel_ips*" in the root of the kernel source found the file) which was src/linux-2.6.36.2/drivers/platform/x86/intel_ips.c

In there the error from the module could only come from this code:

        if (!ips_get_i915_syms(ips)) {
                dev_err(&dev->dev, "failed to get i915 symbols, graphics turbo disabled\n");

And the function it runs starts with

static bool ips_get_i915_syms(struct ips_driver *ips)
{
        ips->read_mch_val = symbol_get(i915_read_mch_val);

And the symbols it gets are in the i915 driver. Unfortunately until that module is loaded into the kernel the IPS driver can't get the i915 symbols and so throws the error. There isn't a dependency set within the intel_ips module for the i915 module so it always gives off an error. I tried changing options in grub to get the i915 module loaded first but the intel_ips module always seems to be loaded first. The only way I found was to wait until linux had fully booted and then remove the module and reload it. Incidentally, this also fixed a problem where the intel_ips module was giving out errors like this:

[   67.047376] intel ips 0000:00:1f.6: CPU power or thermal limit exceeded
[   72.039844] intel ips 0000:00:1f.6: CPU power or thermal limit exceeded

It looks as though not being able to figure out the details of the GPU meant the IPS module meant it couldn't figure out the thermal/power budgets and kept using too much power.

[Danny830x]

I also have this problem. Dell Inspiron n7010. I have received the error since install, but was always able to boot up until now.

Now the error message shows, then I get a scaled down purple Ubuntu screen followed by a terminal like screen which asks for login/pass. I can't use the sudo gedit screen as I get a WARNING: graphics disabled error.

Is there any fix to at least get me back up and running?

[tomtom12]

@Andys42...interesting... Could this also be reason why my HP DM4 does not show remaining battery? It always shows:

Laptop battery (estimating....)

[dondamyani]

I had the issue too,but i found a method to forbiden it

Quote:
sudo gedit /etc/modprobe.d/blacklist.conf
add
Quote:
blacklist intel_ips
that will work

that worked for me too

[tomtom12]

Well... it will hide the warning... but does it mean we do not have optimal graphics?