[PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

Some multi GPU systems may have a VGA compatible device, but that might
not be used for display.  If due to enumeration order this device is
found before the one actually used for display then multiple devices
may show the boot_display attribute, confusing userspace.

When screen info is valid, use it exclusively to find the primary
device so that only the device backing the framebuffer is reported.
Only when no framebuffer has been set up does it make sense to fall
back to the default VGA device.  This ensures at most one primary
graphics device, preferably the one with the framebuffer.

Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: ad90860bd10ee ("fbcon: Use screen info to find primary device")
Reported-by: Aaron Ma <aaron.ma@canonical.com>
Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v1->v2:
  * Fix subject
  * Keep vga_default_device() as fallback instead of remove all
    together
 arch/x86/video/video-common.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
index 152789f00fcda..8ed82fff7638e 100644
--- a/arch/x86/video/video-common.c
+++ b/arch/x86/video/video-common.c
@@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
 	if (!pci_is_display(pdev))
 		return false;
 
-	if (pdev == vga_default_device())
-		return true;
-
 #ifdef CONFIG_SCREEN_INFO
 	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
-	for (i = 0; i < numres; ++i) {
-		if (!(res[i].flags & IORESOURCE_MEM))
-			continue;
+	if (numres > 0) {
+		for (i = 0; i < numres; ++i) {
+			if (!(res[i].flags & IORESOURCE_MEM))
+				continue;
+
+			if (pci_find_resource(pdev, &res[i]))
+				return true;
+		}
 
-		if (pci_find_resource(pdev, &res[i]))
-			return true;
+		return false;
 	}
 #endif
 
-	return false;
+	/*
+	 * No framebuffer was set up by the firmware/bootloader, so fall back
+	 * to the default VGA device.
+	 */
+	return pdev == vga_default_device();
 }
 EXPORT_SYMBOL(video_is_primary_device);
 
-- 
2.43.0

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] The patch unconditionally returns `false` if `screen_info` has memory resources that do not match any standard PCI BAR, breaking primary device detection for systems booting in legacy VGA text modes.
--

commit a8c04b0c2e4edb24a29bd696ebde27323036eb98
Author: Mario Limonciello <mario.limonciello@amd.com>

x86/video: Only fall back to vga_default_device() without screen info

This commit changes the primary video device detection on x86 to rely
exclusively on screen_info if available, and only falls back to
vga_default_device() when no screen info resources are present. This
prevents multiple devices from erroneously claiming the primary
boot_display attribute.

Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t

> diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
> index e0aeee99bc99e..e5fb3cf885fbd 100644
> --- a/arch/x86/video/video-common.c
> +++ b/arch/x86/video/video-common.c
[ ... ]
> @@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
>  	if (!pci_is_display(pdev))
>  		return false;
>  
> -	if (pdev == vga_default_device())
> -		return true;
> -
>  #ifdef CONFIG_SCREEN_INFO
>  	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
> -	for (i = 0; i < numres; ++i) {
> -		if (!(res[i].flags & IORESOURCE_MEM))
> -			continue;
> +	if (numres > 0) {
> +		for (i = 0; i < numres; ++i) {
> +			if (!(res[i].flags & IORESOURCE_MEM))
> +				continue;
> +
> +			if (pci_find_resource(pdev, &res[i]))
> +				return true;
> +		}
>  
> -		if (pci_find_resource(pdev, &res[i]))
> -			return true;
> +		return false;

[Severity: High]
Does this unconditional return break primary display detection for systems
booting via legacy BIOS or VGA text mode?

When booting in legacy VGA text mode, screen_info_resources() populates
resources with legacy memory ranges like 0xa0000 or 0xb8000. Since numres > 0,
the code enters this block.

However, legacy VGA windows are implicitly routed and not explicitly
represented as standard PCI BARs. Because of this, pci_find_resource() will
fail to match.

By returning false here, the code completely bypasses the fallback to
vga_default_device() for these legacy systems. Should this fall through to the
vga_default_device() check instead of returning false when the resources do
not match any standard PCI BAR?

>  	}
>  #endif
>  
> -	return false;
> +	/*
> +	 * No framebuffer was set up by the firmware/bootloader, so fall back
> +	 * to the default VGA device.
> +	 */
> +	return pdev == vga_default_device();
>  }

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260623141505.1816786-1-mario.limonciello@amd.com?part=1

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 6/23/26 07:21, sashiko-bot@kernel.org wrote:
> Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
> - [High] The patch unconditionally returns `false` if `screen_info` has memory resources that do not match any standard PCI BAR, breaking primary device detection for systems booting in legacy VGA text modes.
> --
> 
> commit a8c04b0c2e4edb24a29bd696ebde27323036eb98
> Author: Mario Limonciello <mario.limonciello@amd.com>
> 
> x86/video: Only fall back to vga_default_device() without screen info
> 
> This commit changes the primary video device detection on x86 to rely
> exclusively on screen_info if available, and only falls back to
> vga_default_device() when no screen info resources are present. This
> prevents multiple devices from erroneously claiming the primary
> boot_display attribute.
> 
> Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t
> 
>> diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
>> index e0aeee99bc99e..e5fb3cf885fbd 100644
>> --- a/arch/x86/video/video-common.c
>> +++ b/arch/x86/video/video-common.c
> [ ... ]
>> @@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
>>   	if (!pci_is_display(pdev))
>>   		return false;
>>   
>> -	if (pdev == vga_default_device())
>> -		return true;
>> -
>>   #ifdef CONFIG_SCREEN_INFO
>>   	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
>> -	for (i = 0; i < numres; ++i) {
>> -		if (!(res[i].flags & IORESOURCE_MEM))
>> -			continue;
>> +	if (numres > 0) {
>> +		for (i = 0; i < numres; ++i) {
>> +			if (!(res[i].flags & IORESOURCE_MEM))
>> +				continue;
>> +
>> +			if (pci_find_resource(pdev, &res[i]))
>> +				return true;
>> +		}
>>   
>> -		if (pci_find_resource(pdev, &res[i]))
>> -			return true;
>> +		return false;
> 
> [Severity: High]
> Does this unconditional return break primary display detection for systems
> booting via legacy BIOS or VGA text mode?
> 
> When booting in legacy VGA text mode, screen_info_resources() populates
> resources with legacy memory ranges like 0xa0000 or 0xb8000. Since numres > 0,
> the code enters this block.
> 
> However, legacy VGA windows are implicitly routed and not explicitly
> represented as standard PCI BARs. Because of this, pci_find_resource() will
> fail to match.
> 
> By returning false here, the code completely bypasses the fallback to
> vga_default_device() for these legacy systems. Should this fall through to the
> vga_default_device() check instead of returning false when the resources do
> not match any standard PCI BAR?
> 

Those devices should get a boot_vga attribute instead of boot_display 
attribute.  I think this is OK.

>>   	}
>>   #endif
>>   
>> -	return false;
>> +	/*
>> +	 * No framebuffer was set up by the firmware/bootloader, so fall back
>> +	 * to the default VGA device.
>> +	 */
>> +	return pdev == vga_default_device();
>>   }
> 

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Thomas Zimmermann]

Hi

Am 23.06.26 um 16:15 schrieb Mario Limonciello:
> Some multi GPU systems may have a VGA compatible device, but that might
> not be used for display.  If due to enumeration order this device is
> found before the one actually used for display then multiple devices
> may show the boot_display attribute, confusing userspace.
>
> When screen info is valid, use it exclusively to find the primary
> device so that only the device backing the framebuffer is reported.
> Only when no framebuffer has been set up does it make sense to fall
> back to the default VGA device.  This ensures at most one primary
> graphics device, preferably the one with the framebuffer.
>
> Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
> Fixes: ad90860bd10ee ("fbcon: Use screen info to find primary device")
> Reported-by: Aaron Ma <aaron.ma@canonical.com>
> Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

This looks good. Thanks for fixing this issue.

Best regards
Thomas

> ---
> v1->v2:
>    * Fix subject
>    * Keep vga_default_device() as fallback instead of remove all
>      together
>   arch/x86/video/video-common.c | 23 ++++++++++++++---------
>   1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
> index 152789f00fcda..8ed82fff7638e 100644
> --- a/arch/x86/video/video-common.c
> +++ b/arch/x86/video/video-common.c
> @@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
>   	if (!pci_is_display(pdev))
>   		return false;
>   
> -	if (pdev == vga_default_device())
> -		return true;
> -
>   #ifdef CONFIG_SCREEN_INFO
>   	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
> -	for (i = 0; i < numres; ++i) {
> -		if (!(res[i].flags & IORESOURCE_MEM))
> -			continue;
> +	if (numres > 0) {
> +		for (i = 0; i < numres; ++i) {
> +			if (!(res[i].flags & IORESOURCE_MEM))
> +				continue;
> +
> +			if (pci_find_resource(pdev, &res[i]))
> +				return true;
> +		}
>   
> -		if (pci_find_resource(pdev, &res[i]))
> -			return true;
> +		return false;
>   	}
>   #endif
>   
> -	return false;
> +	/*
> +	 * No framebuffer was set up by the firmware/bootloader, so fall back
> +	 * to the default VGA device.
> +	 */
> +	return pdev == vga_default_device();
>   }
>   EXPORT_SYMBOL(video_is_primary_device);
>   

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Thomas Zimmermann]

FYI a related change to Xorg is at 
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2242

Am 23.06.26 um 16:15 schrieb Mario Limonciello:
> Some multi GPU systems may have a VGA compatible device, but that might
> not be used for display.  If due to enumeration order this device is
> found before the one actually used for display then multiple devices
> may show the boot_display attribute, confusing userspace.
>
> When screen info is valid, use it exclusively to find the primary
> device so that only the device backing the framebuffer is reported.
> Only when no framebuffer has been set up does it make sense to fall
> back to the default VGA device.  This ensures at most one primary
> graphics device, preferably the one with the framebuffer.
>
> Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
> Fixes: ad90860bd10ee ("fbcon: Use screen info to find primary device")
> Reported-by: Aaron Ma <aaron.ma@canonical.com>
> Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
> v1->v2:
>    * Fix subject
>    * Keep vga_default_device() as fallback instead of remove all
>      together
>   arch/x86/video/video-common.c | 23 ++++++++++++++---------
>   1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
> index 152789f00fcda..8ed82fff7638e 100644
> --- a/arch/x86/video/video-common.c
> +++ b/arch/x86/video/video-common.c
> @@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
>   	if (!pci_is_display(pdev))
>   		return false;
>   
> -	if (pdev == vga_default_device())
> -		return true;
> -
>   #ifdef CONFIG_SCREEN_INFO
>   	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
> -	for (i = 0; i < numres; ++i) {
> -		if (!(res[i].flags & IORESOURCE_MEM))
> -			continue;
> +	if (numres > 0) {
> +		for (i = 0; i < numres; ++i) {
> +			if (!(res[i].flags & IORESOURCE_MEM))
> +				continue;
> +
> +			if (pci_find_resource(pdev, &res[i]))
> +				return true;
> +		}
>   
> -		if (pci_find_resource(pdev, &res[i]))
> -			return true;
> +		return false;
>   	}
>   #endif
>   
> -	return false;
> +	/*
> +	 * No framebuffer was set up by the firmware/bootloader, so fall back
> +	 * to the default VGA device.
> +	 */
> +	return pdev == vga_default_device();
>   }
>   EXPORT_SYMBOL(video_is_primary_device);
>   

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Aaron Ma]

Hi Mario,

Tested your v2 patch + Xorg MR !2242 on the hybrid system
(AMD 0x0380 + NVIDIA 0x030000, EFI framebuffer on AMD).

Result:

  AMD:    boot_display=1, boot_vga absent
  NVIDIA: boot_display absent, boot_vga=1

Xorg now picks AMD correctly. boot_display is fixed.

Tested-by: Aaron Ma <aaron.ma@canonical.com>

Aaron

On Tue, Jun 23, 2026 at 10:15 PM Mario Limonciello
<mario.limonciello@amd.com> wrote:
>
> Some multi GPU systems may have a VGA compatible device, but that might
> not be used for display.  If due to enumeration order this device is
> found before the one actually used for display then multiple devices
> may show the boot_display attribute, confusing userspace.
>
> When screen info is valid, use it exclusively to find the primary
> device so that only the device backing the framebuffer is reported.
> Only when no framebuffer has been set up does it make sense to fall
> back to the default VGA device.  This ensures at most one primary
> graphics device, preferably the one with the framebuffer.
>
> Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
> Fixes: ad90860bd10ee ("fbcon: Use screen info to find primary device")
> Reported-by: Aaron Ma <aaron.ma@canonical.com>
> Closes: https://lore.kernel.org/linux-pci/20260618081803.2790848-1-aaron.ma@canonical.com/#t
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
> v1->v2:
>   * Fix subject
>   * Keep vga_default_device() as fallback instead of remove all
>     together
>  arch/x86/video/video-common.c | 23 ++++++++++++++---------
>  1 file changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
> index 152789f00fcda..8ed82fff7638e 100644
> --- a/arch/x86/video/video-common.c
> +++ b/arch/x86/video/video-common.c
> @@ -43,21 +43,26 @@ bool video_is_primary_device(struct device *dev)
>         if (!pci_is_display(pdev))
>                 return false;
>
> -       if (pdev == vga_default_device())
> -               return true;
> -
>  #ifdef CONFIG_SCREEN_INFO
>         numres = screen_info_resources(si, res, ARRAY_SIZE(res));
> -       for (i = 0; i < numres; ++i) {
> -               if (!(res[i].flags & IORESOURCE_MEM))
> -                       continue;
> +       if (numres > 0) {
> +               for (i = 0; i < numres; ++i) {
> +                       if (!(res[i].flags & IORESOURCE_MEM))
> +                               continue;
> +
> +                       if (pci_find_resource(pdev, &res[i]))
> +                               return true;
> +               }
>
> -               if (pci_find_resource(pdev, &res[i]))
> -                       return true;
> +               return false;
>         }
>  #endif
>
> -       return false;
> +       /*
> +        * No framebuffer was set up by the firmware/bootloader, so fall back
> +        * to the default VGA device.
> +        */
> +       return pdev == vga_default_device();
>  }
>  EXPORT_SYMBOL(video_is_primary_device);
>
> --
> 2.43.0
>

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 6/24/26 01:45, Aaron Ma wrote:
> Hi Mario,
> 
> Tested your v2 patch + Xorg MR !2242 on the hybrid system
> (AMD 0x0380 + NVIDIA 0x030000, EFI framebuffer on AMD).
> 
> Result:
> 
>    AMD:    boot_display=1, boot_vga absent
>    NVIDIA: boot_display absent, boot_vga=1
> 
> Xorg now picks AMD correctly. boot_display is fixed.
> 
> Tested-by: Aaron Ma <aaron.ma@canonical.com>
> 

Great news, thanks for checking it.

Bjorn, can you pick this up?  Or do you want this to go through tip?  I 
can see arguments for both ways.

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 6/25/26 17:58, Mario Limonciello wrote:
> On 6/24/26 01:45, Aaron Ma wrote:
>> Hi Mario,
>>
>> Tested your v2 patch + Xorg MR !2242 on the hybrid system
>> (AMD 0x0380 + NVIDIA 0x030000, EFI framebuffer on AMD).
>>
>> Result:
>>
>>    AMD:    boot_display=1, boot_vga absent
>>    NVIDIA: boot_display absent, boot_vga=1
>>
>> Xorg now picks AMD correctly. boot_display is fixed.
>>
>> Tested-by: Aaron Ma <aaron.ma@canonical.com>
>>
> 
> Great news, thanks for checking it.
> 
> Bjorn, can you pick this up?  Or do you want this to go through tip?  I 
> can see arguments for both ways.
> 

Boris or Bjron,

Can you pick this up for fixes?  Here is the lore link.

https://lore.kernel.org/linux-pci/20260623141505.1816786-1-mario.limonciello@amd.com/

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Borislav Petkov]

On Mon, Jul 06, 2026 at 12:47:39PM -0500, Mario Limonciello wrote:
> Boris or Bjron,
> 
> Can you pick this up for fixes?  Here is the lore link.
> 
> https://lore.kernel.org/linux-pci/20260623141505.1816786-1-mario.limonciello@amd.com/

Sashiko has a question and now that I read it, I wanna know too:

https://sashiko.dev/#/patchset/20260623141505.1816786-1-mario.limonciello%40amd.com

:-)

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 7/6/26 10:56 PM, Borislav Petkov wrote:
> On Mon, Jul 06, 2026 at 12:47:39PM -0500, Mario Limonciello wrote:
>> Boris or Bjron,
>>
>> Can you pick this up for fixes?  Here is the lore link.
>>
>> https://lore.kernel.org/linux-pci/20260623141505.1816786-1-mario.limonciello@amd.com/
> 
> Sashiko has a question and now that I read it, I wanna know too:
> 
> https://sashiko.dev/#/patchset/20260623141505.1816786-1-mario.limonciello%40amd.com
> 
> :-)
Those systems use the existing boot_vga sysfs file (which is unchanged).

Userspace recognizes both boot_vga for those systems and boot_display 
for modern systems depending upon the use.

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Borislav Petkov]

On Mon, Jul 06, 2026 at 11:02:04PM -0500, Mario Limonciello wrote:
> Those systems use the existing boot_vga sysfs file (which is unchanged).
> 
> Userspace recognizes both boot_vga for those systems and boot_display for
> modern systems depending upon the use.

You're "explaining" as if I were someone who actually knows anything about
display gunk. But you need to dumb it down for me so that I can actually
understand why we're fine here and we don't need to fallback to
vga_default_device() here, as the LLM has "inferred".

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 7/6/26 23:18, Borislav Petkov wrote:
> On Mon, Jul 06, 2026 at 11:02:04PM -0500, Mario Limonciello wrote:
>> Those systems use the existing boot_vga sysfs file (which is unchanged).
>>
>> Userspace recognizes both boot_vga for those systems and boot_display for
>> modern systems depending upon the use.
> 
> You're "explaining" as if I were someone who actually knows anything about
> display gunk. But you need to dumb it down for me so that I can actually
> understand why we're fine here and we don't need to fallback to
> vga_default_device() here, as the LLM has "inferred".
> 
> Thx.
> 

OK, let me try.

So a long time ago there was this sysfs attribute introduced for telling 
which device in the system was used for displaying pre-OS.  It mattered 
when you had multi GPU systems.

It wasn't perfect, but there were enough heuristics put in place that it 
was good enough.

Userspace would take this as a hint and try to set what it thought was 
the primary GPU.  This has implications for power consumption, what is 
used for rendering, all sorts of stuff.

Well the heuristics started to break when we started having display 
adapters that were no longer VGA and those were in multi GPU systems.

Rather than change the heuristics for boot_vga we introduced a new 
attribute boot_display that indicated which device was used for 
displaying.  This is semantically very similar to boot_vga; but it can 
apply to any display adapter.

Because userspace has used boot_vga forever and boot_display was new 
userspace effectively has to support both for two reasons:

1) so that users can mix and match kernels and userspace
2) For the ancient hardware the LLM is complaining about.

So my point here is that even if boot_display fails to be populated on 
anything in your system (such as reasons the LLM called out) you will 
still have boot_vga, and userspace still uses boot_vga.

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Borislav Petkov]

On Mon, Jul 06, 2026 at 11:47:48PM -0500, Mario Limonciello wrote:
> So my point here is that even if boot_display fails to be populated on
> anything in your system (such as reasons the LLM called out) you will still
> have boot_vga, and userspace still uses boot_vga.

Aha, ok. Thanks for taking the time - that does make more sense.

So looking at Fixes: I presume you want me to send this to Linus now so that
it goes to stable too?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v2] x86/video: Only fall back to vga_default_device() without screen info

[Mario Limonciello]

On 7/7/26 12:01 AM, Borislav Petkov wrote:
> On Mon, Jul 06, 2026 at 11:47:48PM -0500, Mario Limonciello wrote:
>> So my point here is that even if boot_display fails to be populated on
>> anything in your system (such as reasons the LLM called out) you will still
>> have boot_vga, and userspace still uses boot_vga.
> 
> Aha, ok. Thanks for taking the time - that does make more sense.
> 
> So looking at Fixes: I presume you want me to send this to Linus now so that
> it goes to stable too?
> 

Yes, please.