bbswitch cannot find acpi handle for MSI GT60 20C laptop's GTX 770M

[RayfenWindspear]

I have done everything I can think possible and have spent many hours trying to troubleshoot this issue, to no avail. I have whittled the issue down to what I believe to be the problem, but I am not sure where to go from here. Please assist!

I assume the problem to be thus:

[   21.445295] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0

cat /proc/acpi/dump_info 
0000:00:00.0 060000 
0000:00:01.0 060400 \_SB_.PCI0.P0P2
0000:00:02.0 030000 \_SB_.PCI0.GFX0
0000:00:14.0 0c0330 \_SB_.PCI0.XHC_
0000:00:16.0 078000 
0000:00:1a.0 0c0320 \_SB_.PCI0.EHC2
0000:00:1b.0 040300 \_SB_.PCI0.HDEF
0000:00:1c.0 060400 \_SB_.PCI0.RP01
0000:00:1c.2 060400 \_SB_.PCI0.RP03
0000:00:1c.3 060400 \_SB_.PCI0.RP04
0000:00:1c.4 060400 \_SB_.PCI0.RP05
0000:00:1d.0 0c0320 \_SB_.PCI0.EHC1
0000:00:1f.0 060100 \_SB_.PCI0.LPCB
0000:00:1f.2 010601 \_SB_.PCI0.SAT0
0000:00:1f.3 0c0500 \_SB_.PCI0.SBUS
0000:01:00.0 030000 
0000:03:00.0 020000 \_SB_.PCI0.RP03.PXSX
0000:04:00.0 028000 \_SB_.PCI0.RP04.PXSX
0000:05:00.0 ff0000 \_SB_.PCI0.RP05.PXSX

As you can see, my system does not report an acpi handle for my GPU.

I have done all the requested bug reporting stuff here:
https://bugs.launchpad.net/lpbugreporter/+bug/752542/comments/649

(Explained in the bug report) I can manually switch the GPU using the handles \_SB.PCI0.PEG0.PEGP._OFF and \_SB.PCI0.PEG0.PEGP._ON using acpi_call.

I wanted to try inserting these somewhere into the bbswitch code, but I don't know enough about how all this acpi stuff works to understand the code well enough.

Any assistance would be much appreciated.

EDIT: One interesting note is that using my manual method appears to be different than what happens when my system sleeps and wakes. Disabling the GPU manually using acpi_call, then sleep/wake cycling turns the GPU on, but I cannot use optirun/primusrun until I use acpi_call to turn it on, even though it IS on.

[RayfenWindspear]

Here is my little acpi_call script:

#!/bin/sh

if ! lsmod | grep -q acpi_call; then
    insmod /usr/local/myscripts/acpi_call.ko
fi
acpi_call () {
    echo "$*" > /proc/acpi/call
    cat /proc/acpi/call
}


case "$1" in
off)
    echo $(acpi_call "\_SB.PCI0.PEG0.PEGP._OFF")
    echo "Turned off"
;;
on)
    echo $(acpi_call "\_SB.PCI0.PEG0.PEGP._ON")
    echo "Turned on"
;;
*)
    echo "Usage: $0 [on|off]"
esac

[Lekensteyn]

_ON and _OFF are wrong, see https://github.com/Lekensteyn/acpi-stuff/blob/master/notes.txt.

Can you try kernel 3.12? There have been bugs like these in the past, such as #2 and #65. You can also try extending the acpi-handle-hack from the hack-lenovo branch for time time being. The handle for 01:00.0 should be \_SB.PCI0.PEG0.PEGP.

Can you also post your full dmesg somewhere? On https://gist.github.com or something, not here.

[RayfenWindspear]

Thank you for your reply. Here is my dmesg
https://gist.github.com/RayfenWindspear/7059900

I modified my script to use the calls from the document you posted. These ones work after changing the acpi handle to match my _SB.PCI0.PEG0.PEGP

turning the nvidia card off

\_SB.PCI0.P0P2.PEGP._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x1A {1,0,0,3}
\_SB.PCI0.P0P2.PEGP._PS3

turning the nvidia card on

\_SB.PCI0.P0P2.PEGP._PS0

As of now I am unable to try another kernel. I need this specific one for my AI class I am currently in.

As far as the acpi-handle-hack is concerned, I modified the need_acpi_handle_hack function to simply return true; but all I get is:
[ 13.131502] acpi_handle_hack: No ACPI handle found for discrete video card

If this issue will be completely resolved by using a a newer kernel, then I can wait until this semester is over and then update. The only reason I am attached to this kernel is for my AI class.

[Lekensteyn]

Your specific laptop could use this hack (all safeguards are removed, do not use it on other laptops, it could crash your kernel):

diff --git a/acpi-handle-hack.c b/acpi-handle-hack.c
index af5f3cf..ed0a198 100644
--- a/acpi-handle-hack.c
+++ b/acpi-handle-hack.c
@@ -38,6 +38,7 @@ static bool __init need_acpi_handle_hack(void) {
        || (dmi_match(DMI_SYS_VENDOR, "LENOVO") && dmi_match(DMI_PRODUCT_NAME, "PIQY0")) /* Lenovo IdeaPad Y570 */
        || dmi_match(DMI_PRODUCT_NAME, "Aspire V5-573G")
        || dmi_match(DMI_PRODUCT_NAME, "Aspire V5-573PG")
+       || 1
        ;
 }

@@ -70,8 +71,7 @@ static void dev_set_acpi_handle(struct pci_dev *pdev, acpi_handle handle) {
 }

 static int __init hack_apply(void) {
-   acpi_handle tmp_handle, new_handle;
-   struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
+   acpi_handle new_handle;
    if (!need_acpi_handle_hack()) {
        pr_err("Machine does not need ACPI handle hack\n");
        return -ENODEV;
@@ -82,37 +82,14 @@ static int __init hack_apply(void) {
        return -ENODEV;
    }
    orig_handle = DEVICE_ACPI_HANDLE(&dis_dev->dev);
-   if (!orig_handle) {
-       pr_err("No ACPI handle found for discrete video card\n");
-       goto free_dev;
-   }
-   if (ACPI_FAILURE(acpi_get_name(orig_handle, ACPI_SINGLE_NAME, &buf))) {
-       pr_err("Could not acquire name for discrete video card\n");
-       goto free_dev;
-   }
-   if (strcmp((char *)buf.pointer, "PEGP") == 0) {
-       pr_err("Handle has already been changed to PEGP\n");
-       goto free_name;
-   }
-   /* \_SB.PCI0.PEG0.VGA_ -> \_SB.PCI0.PEG0.PEGP */
-   if (ACPI_FAILURE(acpi_get_parent(orig_handle, &tmp_handle))) {
-       pr_err("No parent device found for %s\n", (char *)buf.pointer);
-       goto free_name;
-   }
-   if (ACPI_FAILURE(acpi_get_handle(tmp_handle, "PEGP", &new_handle))) {
-       pr_err("No PEGP handle found on %s\n", (char *)buf.pointer);
-       goto free_name;
+   if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB.PCI0.PEG0.PEGP", &new_handle))) {
+       pr_err("No PEGP handle found\n");
+       return -ENODEV;
    }
    pr_info("Setting new ACPI handle for discrete video card\n");
    dev_set_acpi_handle(dis_dev, new_handle);
-   kfree(buf.pointer);
    pci_dev_put(dis_dev);
    return 0;
-free_name:
-   kfree(buf.pointer);
-free_dev:
-   pci_dev_put(dis_dev);
-   return -ENODEV;
 }

 static void __exit hack_undo(void) {

You can install a new kernel next to your current kernel, so why wait for so long? The packages you need are linux-headers-..._amd64.deb, linux-headers-..._all.deb, linux-image-....amd64.deb. Get them from http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.11.6-saucy/. If that does not work, try http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/. If you still have issues, it is a new bug.

[RayfenWindspear]

I forget that it is easy to manage kernels in linux. I got the new kernel and all appears to be well with bbswitch. It finds the handle and I can switch the gfx on and off. I guess the 3.8 kernel doesn't like my laptop. Thanks for all your help. I will permanently upgrade my kernel after this semester is over.

And yes, the hack you posted works too. Thanks again!!