Hi Robert, I have a tiny comment - inline - On Mon, Dec 27, 2010 at 4:18 PM, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote: > > this is a copy of something i forwarded to the linux kernel mailing > list, and i'd be interested if anyone else would test this and > reproduce the problem: > > ===== start ===== > > on my ubuntu laptop (gateway NV79), a 2.6.37-rc7+ kernel i just > built now boots to a black screen. no text mode, no virtual consoles, > nothing. > > this is probably the best explanation: > > http://www.oblurb.com/ubuntu-dell-latitude-e6510-intel-gpu-blank-screen.html > > annoyingly, i'm currently running a 2.6.37-rc5+ hand-rolled kernel > that works fine, but this more recent kernel doesn't, and a kernel > *earlier* also doesn't work, so this issue seems to come and go. > > here's another extended conversation on the same topic: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/600453 > > here's the relevant output from lspci: > > 00:02.0 VGA compatible controller: Intel Corporation Core Processor > Integrated Graphics Controller (rev 12) (prog-if 00 [VGA controller]) > Subsystem: Acer Incorporated [ALI] Device 031c > Flags: bus master, fast devsel, latency 0, IRQ 41 > Memory at d0000000 (64-bit, non-prefetchable) [size=4M] > Memory at c0000000 (64-bit, prefetchable) [size=256M] > I/O ports at 3050 [size=8] > Expansion ROM at <unassigned> [disabled] > Capabilities: <access denied> > Kernel driver in use: i915 > Kernel modules: i915 > > if i use "nomodeset", i can boot to the command line and no further. > i'm open to suggestions. > > ===== end ===== > > in short, a while back, building a kernel from the git repo failed > to give me a working kernel. suddenly, as of 2.6.37-rc5, it worked > fine and it's the kernel i'm running under right now: > > $ uname -r > 2.6.37-rc5+ > $ > > and now, as of 2.6.37-rc7, it's back to being borked. i'd love to > have piles of free time to track this down but, before i do that, i'd > be interested in having someone else try this and let me know if > exactly the same thing happens for them. > > this is a a gateway NV79 laptop, intel core i3-330m, with intel > integrated graphics controller. thoughts? > > rday > > p.s. it seems clear that the system doesn't simply hang. even after > the screen goes black very early in the boot process, there is ample > disk activity showing that the boot is continuing, and i eventually > hear the little ubuntu "drum roll" that indicates i'm at the login > screen. so it's just the video that's died. What parameters are being passed to the new kernel via Grub? I had the same issue (don't remember, but I think it was with one of the rc build of 2.6.34) and it could drill it down to a 'vga' parameter on the Grub command line. I removed everything (including any standard 'quiet' parameter which Ubuntu distro kernel has) and managed to boot with some vga value I can't recall (will search and post in case I can find it). I understand that you priority could be to find the solution to this bug - what I state here is just a stop gap solution in case you have not already figured that out. Apologies in case this is obvious to you. > > -- > > ======================================================================== > Robert P. J. Day Waterloo, Ontario, CANADA > http://crashcourse.ca > > Twitter: http://twitter.com/rpjday > LinkedIn: http://ca.linkedin.com/in/rpjday > ======================================================================== > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > - Shreyansh _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
