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    SubjectRe: Regression: black screen on VGA w/ nouveau in Linux 3.3
    On 2012-04-03 21:27 -0400, Nick Bowler wrote:
    > CCing Tom Bylander as he sent me a mail off-list saying he experiences
    > a similar issue on an FX 5200.
    >
    > Tom, maybe you'll have better luck bisecting this than I did?
    >
    > On 2012-03-19 10:35 -0400, Nick Bowler wrote:
    > > Just upgraded to Linux 3.3 on my desktop and noticed that the VGA output
    > > on my card w/ nouveau is totally black (both at the console and in X).
    > > Almost everything appears to work normally: DPMS works, modesetting
    > > works, DDC works... all messages indicate that things are working --
    > > just the image is completely black.
    >
    > OK, so this is still reproducible on Linux 3.4-rc1+ (Linus' master). I
    > captured the dmesg output before (3.2.13, which is a working kernel),
    > and after (3.3.1 and 3.4-rc1-00144-g01627d9 - both fail in an identical
    > manner). All three logs are attached in full (gzipped).

    Ping? I'm still seeing this on 3.4-rc3+. Is there any other info that
    I need to provide?

    > One thing that immediately jumps out is the WARNING in the 3.4-rc1+ log
    > that occurs early and did not appear in either of the other logs:
    >
    > ------------[ cut here ]------------
    > WARNING: at /home/nick/misc/linux-2.6/arch/x86/pci/i386.c:60
    > pcibios_fwaddrmap_lookup+0x1d/0x3d()
    > Hardware name: K8N-E-Deluxe
    > Modules linked in:
    > Pid: 1, comm: swapper Not tainted 3.4.0-rc1-00144-g01627d9 #47
    > Call Trace:
    > [<ffffffff81026baf>] warn_slowpath_common+0x80/0x98
    > [<ffffffff81026bdc>] warn_slowpath_null+0x15/0x17
    > [<ffffffff8129f79f>] pcibios_fwaddrmap_lookup+0x1d/0x3d
    > [<ffffffff81687306>] pcibios_allocate_resources+0xd4/0x217
    > [<ffffffff81688447>] ? pci_legacy_init+0x3e/0x3e
    > [<ffffffff81687460>] pcibios_resource_survey+0x17/0x2d
    > [<ffffffff81688dfd>] pcibios_init+0x28/0x3a
    > [<ffffffff8168848e>] pci_subsys_init+0x47/0x4d
    > [<ffffffff810002e2>] do_one_initcall+0x78/0x126
    > [<ffffffff81662bab>] kernel_init+0xe9/0x17a
    > [<ffffffff8166248a>] ? rdinit_setup+0x28/0x28
    > [<ffffffff8131ac44>] kernel_thread_helper+0x4/0x10
    > [<ffffffff81662ac2>] ? start_kernel+0x321/0x321
    > [<ffffffff8131ac40>] ? gs_change+0xb/0xb
    > ---[ end trace 4eaa2a86a8e2da22 ]---
    >
    > Other than that, I diffed the 3.2.13 log and 3.4-rc1+ log and grepped
    > for nouveau-related differences. I see no obvious errors, but I admit
    > that I don't really know what to look for.
    >
    > % diff -u nouveau-3.2.13.log nouveau-3.4-rc1+.log | grep -C3 '\[drm\]'
    >
    > @@ -418,19 +429,21 @@
    > Real Time Clock Driver v1.12b
    > Linux agpgart interface v0.103
    > [drm] Initialized drm 1.1.0 20060810
    > +VGA switcheroo: detected Optimus DSM method \ handle
    > ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 19
    > -nouveau 0000:01:00.0: PCI INT A -> Link[LNKE] -> GSI 19 (level, low) -> IRQ 19
    > [drm] nouveau 0000:01:00.0: Detected an NV30 generation card (0x436200a1)
    > -[drm] nouveau 0000:01:00.0: Attempting to load BIOS image from PRAMIN
    > +[drm] nouveau 0000:01:00.0: Checking PRAMIN for VBIOS
    > [drm] nouveau 0000:01:00.0: ... appears to be valid
    > +[drm] nouveau 0000:01:00.0: Using VBIOS from PRAMIN
    > [drm] nouveau 0000:01:00.0: BMP BIOS found
    > [drm] nouveau 0000:01:00.0: BMP version 5.40
    > [drm] nouveau 0000:01:00.0: Bios version 04.36.20.21
    > -[drm] nouveau 0000:01:00.0: Found Display Configuration Block version 2.2
    > -[drm] nouveau 0000:01:00.0: Raw DCB entry 0: 01000300 00009c40
    > -[drm] nouveau 0000:01:00.0: Raw DCB entry 1: 02010310 00009c40
    > -[drm] nouveau 0000:01:00.0: Raw DCB entry 2: 04000302 00000000
    > -[drm] nouveau 0000:01:00.0: Raw DCB entry 3: 02020321 00000303
    > +[drm] nouveau 0000:01:00.0: MXM: no VBIOS data, nothing to do
    > +[drm] nouveau 0000:01:00.0: DCB version 2.2
    > +[drm] nouveau 0000:01:00.0: DCB outp 00: 01000300 00009c40
    > +[drm] nouveau 0000:01:00.0: DCB outp 01: 02010310 00009c40
    > +[drm] nouveau 0000:01:00.0: DCB outp 02: 04000302 00000000
    > +[drm] nouveau 0000:01:00.0: DCB outp 03: 02020321 00000303
    > [drm] nouveau 0000:01:00.0: Loading NV17 power sequencing microcode
    > [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 0 at offset 0xF01D
    > [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 1 at offset 0xF4E1
    > @@ -439,11 +452,10 @@
    > [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 4 at offset 0xF8B3
    > [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 5 at offset 0xF8D0
    > [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 6 at offset 0xF959
    > -[drm] nouveau 0000:01:00.0: 0 available performance level(s)
    > -[drm] nouveau 0000:01:00.0: c: core 425MHz memory 501MHz voltage 1350mV
    > -[TTM] Zone kernel: Available graphics memory: 512160 kiB.
    > -[TTM] Initializing pool allocator.
    > -[drm] nouveau 0000:01:00.0: Detected 256MiB VRAM
    > +[TTM] Zone kernel: Available graphics memory: 512142 kiB
    > +[TTM] Initializing pool allocator
    > +[TTM] Initializing DMA pool allocator
    > +[drm] nouveau 0000:01:00.0: Detected 256MiB VRAM (DDR1)
    > agpgart-amd64 0000:00:00.0: AGP 3.0 bridge
    > agpgart: swapper tried to set rate=x12. Setting to AGP3 x8 mode.
    > agpgart-amd64 0000:00:00.0: putting AGP V3 device into 8x mode
    > @@ -452,11 +464,14 @@
    > [drm] nouveau 0000:01:00.0: Saving VGA fonts
    > [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
    > [drm] No driver support for vblank timestamp query.
    > +[drm] nouveau 0000:01:00.0: 0 available performance level(s)
    > +[drm] nouveau 0000:01:00.0: c: core 425MHz memory 501MHz voltage 1350mV
    > +[drm] nouveau 0000:01:00.0: 0xE51A: Parsing digital output script table
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 1)
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on tmds encoder (output 2)
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on TV encoder (output 3)
    > -[drm] nouveau 0000:01:00.0: allocated 1280x1024 fb: 0x49000, bo ffff88003da11400
    > +[drm] nouveau 0000:01:00.0: allocated 1280x1024 fb: 0x49000, bo ffff88003e314c00
    > fbcon: nouveaufb (fb0) is primary device
    > [drm] nouveau 0000:01:00.0: 0xE51A: Parsing digital output script table
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on tmds encoder (output 2)
    > @@ -466,12 +481,11 @@
    > Console: switching to colour frame buffer device 160x64
    > fb0: nouveaufb frame buffer device
    > drm: registered panic notifier
    > -[drm] Initialized nouveau 0.0.16 20090420 for 0000:01:00.0 on minor 0
    > +[drm] Initialized nouveau 1.0.0 20120316 for 0000:01:00.0 on minor 0
    > brd: module loaded
    > sata_nv 0000:00:0a.0: version 3.5
    > ACPI: PCI Interrupt Link [LTID] BIOS reported IRQ 0, using IRQ 22
    > --
    > +NFS: Registering the id_resolver key type
    > it87: Found IT8712F chip at 0xd00, revision 7
    > it87: VID is disabled (pins used for GPIO)
    > [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 1)
    >
    > > The VGA is one of two outputs in use: the other (DVI) output works
    > > normally. The card also has an unused TV-out port, FWIW.
    > >
    > > The card is an NV36 generation (Geforce FX5700 AGP). This is a
    > > regression from Linux 3.2 -- unfortunately, bisection has proved
    > > extremely difficult because the intermediate kernels git is asking me
    > > to test panic immediately on boot (and compiling Linux takes a fairly
    > > long time on this box too). The failed attempt went like this:
    > >
    > > git bisect start 'drivers/gpu'
    > > # bad: [c16fa4f2ad19908a47c63d8fa436a1178438c7e7] Linux 3.3
    > > git bisect bad c16fa4f2ad19908a47c63d8fa436a1178438c7e7
    > > # good: [805a6af8dba5dfdd35ec35dc52ec0122400b2610] Linux 3.2
    > > git bisect good 805a6af8dba5dfdd35ec35dc52ec0122400b2610
    > > # skip: [5d56fe5fd794a98c4f446f8665fd06b82e93ff64] Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-core-next
    > > git bisect skip 5d56fe5fd794a98c4f446f8665fd06b82e93ff64
    > > # good: [dffc9ceb55695f121adc57dd1fde7304c3afe81e] gma500: kill virtual mapping support
    > > git bisect good dffc9ceb55695f121adc57dd1fde7304c3afe81e
    > > # skip: [5c2a5ce689c99037771a6c110374461781a6f042] drm: add missing exports for i810 driver.
    > > git bisect skip 5c2a5ce689c99037771a6c110374461781a6f042
    > > # skip: [44517c44496062180a6376cc704b33129441ce60] drm/radeon/kms: Add an MSI quirk for Dell RS690
    > > git bisect skip 44517c44496062180a6376cc704b33129441ce60
    > >
    > > (I stopped at this point)
    > >
    > > I'm running the latest git xf86-video-nouveau, but since the issue
    > > occurs at the console it's probably not too important...

    Thanks,
    --
    Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)



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