| Message ID | 1519874875-26281-1-git-send-email-alex.hung@canonical.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Delegated to: | Rafael Wysocki |
| Headers | show |
Is the V3 patch meet the expectation or is there anything I need to refine? On Wed, Feb 28, 2018 at 7:27 PM, Alex Hung <alex.hung@canonical.com> wrote: > A number of Dell systems require an OEM _OSI string "Linux-Dell-Video" > as a BIOS workaround to disable RTD3 which causes systems hangs when > nvidia graphics cards are installed. The affected Dell systems are with > system IDs: 0818, 0819, 0820, 0850, 0851, 086F, 0870, 0885 and 0886. > > The form of the OEM _OSI strings is defined by each OEMs and is > discussed in Documentation/acpi/osi.txt. > > Signed-off-by: Alex Hung <alex.hung@canonical.com> > --- > drivers/acpi/osi.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c > index 76998a5..a22fe3a 100644 > --- a/drivers/acpi/osi.c > +++ b/drivers/acpi/osi.c > @@ -57,6 +57,14 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { > {"Processor Device", true}, > {"3.0 _SCP Extensions", true}, > {"Processor Aggregator Device", true}, > + /* Linux-Dell-Video is used by BIOS to disable RTD3 for nvidia graphics > + * cards as RTD3 is not supported by drivers now. Systems with nvidia > + * cards will hang without RTD3 disabled. > + * > + * Once nvidia drivers officially support RTD3, this _OSI strings can > + * be removed if both new and old graphics cards are supported. > + */ > + {"Linux-Dell-Video", true}, > }; > > static u32 acpi_osi_handler(acpi_string interface, u32 supported) > -- > 2.7.4 >
On Mon, Mar 19, 2018 at 6:01 PM, Alex Hung <alex.hung@canonical.com> wrote: > Is the V3 patch meet the expectation or is there anything I need to refine? It has been tentatively queued up for 4.17. Thanks! > On Wed, Feb 28, 2018 at 7:27 PM, Alex Hung <alex.hung@canonical.com> wrote: >> A number of Dell systems require an OEM _OSI string "Linux-Dell-Video" >> as a BIOS workaround to disable RTD3 which causes systems hangs when >> nvidia graphics cards are installed. The affected Dell systems are with >> system IDs: 0818, 0819, 0820, 0850, 0851, 086F, 0870, 0885 and 0886. >> >> The form of the OEM _OSI strings is defined by each OEMs and is >> discussed in Documentation/acpi/osi.txt. >> >> Signed-off-by: Alex Hung <alex.hung@canonical.com> >> --- >> drivers/acpi/osi.c | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c >> index 76998a5..a22fe3a 100644 >> --- a/drivers/acpi/osi.c >> +++ b/drivers/acpi/osi.c >> @@ -57,6 +57,14 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { >> {"Processor Device", true}, >> {"3.0 _SCP Extensions", true}, >> {"Processor Aggregator Device", true}, >> + /* Linux-Dell-Video is used by BIOS to disable RTD3 for nvidia graphics >> + * cards as RTD3 is not supported by drivers now. Systems with nvidia >> + * cards will hang without RTD3 disabled. >> + * >> + * Once nvidia drivers officially support RTD3, this _OSI strings can >> + * be removed if both new and old graphics cards are supported. >> + */ >> + {"Linux-Dell-Video", true}, >> }; >> >> static u32 acpi_osi_handler(acpi_string interface, u32 supported) >> -- -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c index 76998a5..a22fe3a 100644 --- a/drivers/acpi/osi.c +++ b/drivers/acpi/osi.c @@ -57,6 +57,14 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { {"Processor Device", true}, {"3.0 _SCP Extensions", true}, {"Processor Aggregator Device", true}, + /* Linux-Dell-Video is used by BIOS to disable RTD3 for nvidia graphics + * cards as RTD3 is not supported by drivers now. Systems with nvidia + * cards will hang without RTD3 disabled. + * + * Once nvidia drivers officially support RTD3, this _OSI strings can + * be removed if both new and old graphics cards are supported. + */ + {"Linux-Dell-Video", true}, }; static u32 acpi_osi_handler(acpi_string interface, u32 supported)
A number of Dell systems require an OEM _OSI string "Linux-Dell-Video" as a BIOS workaround to disable RTD3 which causes systems hangs when nvidia graphics cards are installed. The affected Dell systems are with system IDs: 0818, 0819, 0820, 0850, 0851, 086F, 0870, 0885 and 0886. The form of the OEM _OSI strings is defined by each OEMs and is discussed in Documentation/acpi/osi.txt. Signed-off-by: Alex Hung <alex.hung@canonical.com> --- drivers/acpi/osi.c | 8 ++++++++ 1 file changed, 8 insertions(+)