Date: Thu, 13 Aug 2015 09:34:56 +0200 From: Jakob Alvermark <jakob@alvermark.net> To: FreeBSD Current <freebsd-current@freebsd.org> Cc: Anders Bolt-Evensen <andersbo87@icloud.com> Subject: Re: SV: UEFI boot fail on higher resolutions (Re: Acer E3-112 and UEFI) Message-ID: <13068595-3B9C-4F96-9ECC-DAB4CFA245EF@alvermark.net> In-Reply-To: <056801d0c12f$78d800f0$6a8802d0$@icloud.com> References: <20876.213.113.68.53.1419950410.squirrel@webmail.alvermark.net> <54A2CC2D.3040105@freebsd.org> <42818.213.113.68.53.1420039470.squirrel@webmail.alvermark.net> <E86A0514-6C11-4592-BB62-0F992727AFDC@alvermark.net> <24273.85.229.92.85.1435690356.squirrel@webmail.alvermark.net> <056801d0c12f$78d800f0$6a8802d0$@icloud.com>
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On 18 jul 2015, at 09:57, Anders Bolt-Evensen wrote: > <Another update! > < > <As I found out the EFI loader has the capability to change screen modes I > dumped refind and started playing with this again. > <"mode 5" gives me 1024x768 and a panic: > < > <--- > <kernel trap 12 with interrupts disabled > < > < > <Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 > <fault virtual address = 0x1f2d0ec > <fault code = supervisor read data, page not present > <Instruction pointer = 0x20:0xffffffff8030003d > <stack pointer = 0x28:0xffffffff81616f70 > <frame pointer = 0x28:0x0 > <code segment = base 0x0, limit 0xfffff, type 0x1b > < = DPL 0, pres 1, long 1, def32 0, gran 1 > <processor eflags = resume, IOPL = 0 > <current process = 0 () > <--- > < > <What struck me then was this line: > <instruction pointer = 0x20:0xffffffff8030003d > <and the fact that: > <EFI framebuffer information: > <addr, size 0x80000000, 0x300000 > < > <Coincidence? Maybe not. > <In sys/dev/vt/hw/efifb/efifb.c I changed this line: > < > <info->fb_vbase = PHYS_TO_DMAP(efifb->fb_addr); > < > <Into this hack: > < > <info->fb_vbase = PHYS_TO_DMAP(0x90000000); > < > <Recompile kernel and now it boots at native resolution (1366x768)! > < > <Any thoughts on this? > < > <Thanks, > < > <Jakob > > I tried your hack on my Acer Aspire V17 Nitro with a 1920x1080 display, and > it seems that your hack works on my computer as well. > Before I tried your hack, I was basically unable to do a UEFI boot unless I > tried the rEFInd method, but thanks to your hack I am now able to do a > regular UEFI boot at the native resolution of 1920x1080. :D > Thank you so much for your tip. :) This appears to have been fixed by r286667 (At least on the Acer laptop, haven't tested on any other machine) Thanks! Jakob
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