[Bug 49351] New: vga_switcheroo results in black screen (bisected)

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bugzilla-daemon＠bugzilla.kernel.org

22 Oct 2012 22 Oct '12

9:31 p.m.

https://bugzilla.kernel.org/show_bug.cgi?id=49351

Summary: vga_switcheroo results in black screen (bisected) Product: Drivers Version: 2.5 Kernel Version: 3.7-rc1+ Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: e-mail@date.by CC: alexdeucher@gmail.com Regression: Yes

Created an attachment (id=84381) --> (https://bugzilla.kernel.org/attachment.cgi?id=84381) lspci -vvv

On my muxed hybrid system (Lenovo IdeaPad U455) vga_switcheroo doesn't work as expected. Initially after system booting both video cards are powered and the IGD one is active. Then, when i try to switch active gpu with

# echo DIS > /sys/kernel/debug/vgaswitcheroo/switch

screen goes black. The first bad commit, that broke vga_switcheroo is:

commit 492b49a2f21a7ce6cb0abce36017daa06036a626 Author: Alex Deucher alexander.deucher@amd.com Date: Thu Aug 16 14:07:37 2012 -0400

drm/radeon: reorganize ATPX support (v2)

- rework the acpi execute code - User proper parameters for ATPX functions

v2: rebase fixes

Signed-off-by: Alex Deucher alexander.deucher@amd.com

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bugzilla-daemon＠bugzilla.kernel.org

22 Oct 22 Oct

9:45 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #1 from Alex Deucher alexdeucher@gmail.com 2012-10-22 21:45:08 --- Created an attachment (id=84391) --> (https://bugzilla.kernel.org/attachment.cgi?id=84391) debug output

Can you attach the dmesg output with this patch applied? No need to try and switch gpus. I just need the output.

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bugzilla-daemon＠bugzilla.kernel.org

23 Oct 23 Oct

1:26 a.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #2 from Igor Murzov e-mail@date.by 2012-10-23 01:26:13 --- Created an attachment (id=84401) --> (https://bugzilla.kernel.org/attachment.cgi?id=84401) dmesg output for v3.7.0-rc2+ with the patch applied

I'm sure that i did everything right, but there is no "ATPX function mask" message in the log.

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bugzilla-daemon＠bugzilla.kernel.org

1:50 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

Alex Deucher alexdeucher@gmail.com changed:

--- Comment #3 from Alex Deucher alexdeucher@gmail.com 2012-10-23 13:50:29 --- Created an attachment (id=84441) --> (https://bugzilla.kernel.org/attachment.cgi?id=84441) debug output

Try this version.

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bugzilla-daemon＠bugzilla.kernel.org

3 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #4 from Igor Murzov e-mail@date.by 2012-10-23 15:00:02 --- Still no "ATPX function mask" in the log.

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bugzilla-daemon＠bugzilla.kernel.org

3:03 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #5 from Alex Deucher alexdeucher@gmail.com 2012-10-23 15:03:11 --- Does it show up if you try switching?

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bugzilla-daemon＠bugzilla.kernel.org

3:15 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #6 from Igor Murzov e-mail@date.by 2012-10-23 15:15:40 --- No.

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bugzilla-daemon＠bugzilla.kernel.org

3:19 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #7 from Alex Deucher alexdeucher@gmail.com 2012-10-23 15:19:20 --- It should be printing. Make sure you've booted the right kernel and are using the right module. If you are using an initrd, make sure it's up to date. Make sure you aren't redirecting your kernel output somewhere. Maybe check /var/log/messages as well.

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bugzilla-daemon＠bugzilla.kernel.org

3:44 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #8 from Igor Murzov e-mail@date.by 2012-10-23 15:44:39 --- Created an attachment (id=84451) --> (https://bugzilla.kernel.org/attachment.cgi?id=84451) dmesg output for v3.7.0-rc2+

This dmesg output was produced with following changes:

---------------------------------------------- static int radeon_atpx_verify_interface(struct radeon_atpx *atpx) { union acpi_object *info; struct atpx_verify_interface output; size_t size; int err = 0; printk("*\n"); info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; printk("**\n"); memset(&output, 0, sizeof(output));

size = *(u16 *) info->buffer.pointer; if (size < 8) { printk("ATPX buffer is too small: %zu\n", size); err = -EINVAL; goto out; } printk("***\n"); size = min(sizeof(output), size);

memcpy(&output, info->buffer.pointer, size);

/* TODO: check version? */ printk("ATPX version %u\n", output.version); printk("****\n"); radeon_atpx_parse_functions(&atpx->functions, output.function_bits);

out: kfree(info); return err; } ----------------------------------------------

And there is only one asterisk in the log: ---------------------------------------------- [ 11.199661] vga_switcheroo: enabled [ 11.199747] * ----------------------------------------------

So it is clear that some error is encountered in radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL); That explains why there is no "ATPX function mask" message in the log.

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bugzilla-daemon＠bugzilla.kernel.org

5:17 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #9 from Alex Deucher alexdeucher@gmail.com 2012-10-23 17:17:15 --- Created an attachment (id=84461) --> (https://bugzilla.kernel.org/attachment.cgi?id=84461) possible fix 1

Try this patch and see if it helps.

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bugzilla-daemon＠bugzilla.kernel.org

5:22 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #10 from Alex Deucher alexdeucher@gmail.com 2012-10-23 17:22:14 --- Created an attachment (id=84471) --> (https://bugzilla.kernel.org/attachment.cgi?id=84471) possible fix 2

If the previous patch doesn't help, try this one.

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bugzilla-daemon＠bugzilla.kernel.org

5:57 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #11 from Igor Murzov e-mail@date.by 2012-10-23 17:57:53 --- The first patch doesn't help.

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bugzilla-daemon＠bugzilla.kernel.org

6:25 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #12 from Igor Murzov e-mail@date.by 2012-10-23 18:25:48 --- Created an attachment (id=84481) --> (https://bugzilla.kernel.org/attachment.cgi?id=84481) dmesg output for v3.7.0-rc2+ with kbug49351-2.diff applied

The second patch doens't help either. And it results in the following warnings: -------------------------------------------- [ 11.675240] ACPI Warning: For _SB_.PCI0.AGP_.VGA_.ATIF: Insufficient arguments - needs 2, found 1 (20120913/nspredef-321) [ 11.675688] ACPI Warning: For _SB_.PCI0.AGP_.VGA_.ATIF: Insufficient arguments - needs 2, found 1 (20120913/nspredef-321) --------------------------------------------

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bugzilla-daemon＠bugzilla.kernel.org

7:09 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #13 from Alex Deucher alexdeucher@gmail.com 2012-10-23 19:09:28 --- Please attach the dmesg output from a working kernel.

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bugzilla-daemon＠bugzilla.kernel.org

7:12 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

Alex Deucher alexdeucher@gmail.com changed:

--- Comment #14 from Alex Deucher alexdeucher@gmail.com 2012-10-23 19:12:29 --- Created an attachment (id=84491) --> (https://bugzilla.kernel.org/attachment.cgi?id=84491) debug output

Please attach the dmesg output with this patch applied.

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bugzilla-daemon＠bugzilla.kernel.org

8:02 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #15 from Igor Murzov e-mail@date.by 2012-10-23 20:02:35 --- Created an attachment (id=84511) --> (https://bugzilla.kernel.org/attachment.cgi?id=84511) dmesg output for v3.5.2

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bugzilla-daemon＠bugzilla.kernel.org

8:42 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #16 from Igor Murzov e-mail@date.by 2012-10-23 20:42:41 --- Created an attachment (id=84531) --> (https://bugzilla.kernel.org/attachment.cgi?id=84531) dmesg output for v3.7.0-rc2+ with kbug49351.diff applied

[ 11.833549] vga_switcheroo: enabled [ 11.833648] evaluate ATPX got AE_NOT_FOUND [ 11.833750] buffer.pointer NULL

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bugzilla-daemon＠bugzilla.kernel.org

8:52 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

Alex Deucher alexdeucher@gmail.com changed:

--- Comment #17 from Alex Deucher alexdeucher@gmail.com 2012-10-23 20:52:43 --- Created an attachment (id=84541) --> (https://bugzilla.kernel.org/attachment.cgi?id=84541) possible fix

Does this patch fix the issue?

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bugzilla-daemon＠bugzilla.kernel.org

9:27 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

--- Comment #18 from Igor Murzov e-mail@date.by 2012-10-23 21:27:47 --- Created an attachment (id=84561) --> (https://bugzilla.kernel.org/attachment.cgi?id=84561) dmesg output for v3.7.0-rc2+ with the patch from comment #17

vga_switcheroo seems to work fine with the last patch.

[ 11.832217] vga_switcheroo: enabled [ 11.852254] ATPX version 1 [ 11.852325] ATPX function mask 0x087

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bugzilla-daemon＠bugzilla.kernel.org

4 Nov 4 Nov

9:05 p.m.

New subject: [Bug 49351] vga_switcheroo results in black screen (bisected)

https://bugzilla.kernel.org/show_bug.cgi?id=49351

Igor Murzov e-mail@date.by changed:

--- Comment #19 from Igor Murzov e-mail@date.by 2012-11-04 21:05:05 --- Fixed by:

commit 0b90365e7a32317b948583c4b5c2712d84610b08 Author: Alex Deucher alexander.deucher@amd.com Date: Tue Oct 23 17:57:54 2012 -0400

drm/radeon: fix ATPX regression in acpi rework

Copy and paste typo in the apci rework.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=49351

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