On Fri, 28 Jan 2011, Chris Wilson wrote:
On Fri, 28 Jan 2011 08:53:59 -0500 (EST), "Robert P. J. Day" rpjday@crashcourse.ca wrote:
so the culprit appears to be:
b705120e4198315f4ae043de06c62f65e0851fd3 is the first bad commit commit b705120e4198315f4ae043de06c62f65e0851fd3 Author: Michael Karcher kernel@mkarcher.dialup.fu-berlin.de Date: Sun Jan 23 18:17:17 2011 +0000
drm/i915: Use consistent mappings for OpRegion between ACPI and i915 The opregion is a shared memory region between ACPI and the graphics driver. As the ACPI mapping has been changed to cachable in commit 6d5bbf00d251cc73223a71422d69e069dc2e0b8d, mapping the intel opregion non-cachable now fails. As no bus-master hardware is involved in the opregion, cachable map should do no harm. Tested on a Fujitsu Lifebook P8010. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> [ickle: convert to acpi_os_ioremap for consistency] Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>thoughts? once again, the salient output from "lspci -v":
Indeed looks like using ioremap_cache is not as safe as was assumed. Does
diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h index 7180013..42108ab 100644 --- a/include/linux/acpi_io.h +++ b/include/linux/acpi_io.h @@ -7,7 +7,7 @@ static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size) {
return ioremap_cache(phys, size);
return ioremap_wc(phys, size);}
int acpi_os_map_generic_address(struct acpi_generic_address *addr);
that didn't appear to make a difference. same black screen issue. BTW, here's an excerpt from /var/log/dmesg for a *successful* boot (i just rebooted to 8a327f23):
... [ 24.037114] intel ips 0000:00:1f.6: failed to get i915 symbols, graphics turbo disabled ... [ 27.155660] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 27.155665] i915 0000:00:02.0: setting latency timer to 64 [ 27.217407] mtrr: no more MTRRs available [ 27.217411] [drm] MTRR allocation failed. Graphics performance may suffer. [ 27.217848] ioremap error for 0xb3752000-0xb3755000, requested 0x10, got 0x0 [ 27.217933] i915 0000:00:02.0: irq 42 for MSI/MSI-X [ 27.217938] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 27.217940] [drm] Driver supports precise vblank timestamp query. ...
if any of that is of any use.
fix your boot issue or do we need to go back to using uncached:
return ioremap(phys, size);
is that the next change you want me to try?
rday